1. I have specially noticed that when I approach really beautiful women instead of "hot women", I get better results. And in dating, they are much more easier to handle as well, with much less baggage. Is there any relationship between a "genuinely beautiful woman" and her propensity to accept below average looking mates? If not, why I am experiencing this? Is it because the girls think, when the difference in attractiveness is significant and apparent, just saying hi to them is an act of confidence?
First, its important to note that looks are malleable. When I wake up in the morning I look like a "6". If I wasn't fit, I'd probably look like a "4" or less (depending on exactly how "not fit" we're assuming I would be). If I dress right, do my hair correctly, make eye contact/have good body language, I'm usually one of the hottest guys in the room.
Don't believe me? Look up any supermodel with no makeup. Look at how drastic the difference is. You can do that too. Especially since there's no competition in this department. Most guys barely even try. Just get some nice clothes which fit your body (if you don't know what that looks like, get someone who does to help you), get a good haircut from a SALON with guys who know wtf they're doing. Don't cheap out. It's worth it. And get in at least somewhat decent shape if you're not already (not always easy, but it will probably help you more than anything else). You don't have to look like Adonis or anything. But if you're 40 lbs overweight you're severely handicapping yourself.
Now....to answer your question,
If by "hot women" you mean girls who have worked on their beauty extensively (e.g. they have perfect makeup, perfect hair, perfectly suited dress, but aren't actually that genetically beautiful) then this makes sense. Most of these girls care more about looks than the average girl. Because these girls have put in a lot of effort into looking good. So simply put, that's something they value. It's an important part of their lives. So naturally, they'll want to date guys who are also good looking. Also, these are typically girls who are all other things being equal, more likely to be status jockeys. That means they even more than other girls want to find guys who make them look good. And it's harder to do that if the guy they're dating looks like a shleb.
Also, imo these girls get more attention from loser/creepy guys more than anyone else. So they're especially guarded. More than their less "hot" counterparts.
Conversely, I would suspect that by "genuinely beautiful" you mean girls who are naturally good looking. They don't necessarily have as much flashiness and flare to their looks. But they've "hit the genetic jackpot" so to speak. So even without all that, they're still cute. If so then again...it would make sense that they're more open to talking to you. Because they may not have necessarily put in as much effort into their looks. Therefore they may not value looks as much. They might value other things more. So they give you more of a chance. Especially when you initially come up and talk to them.
^I could be wrong about all this, and it might have more to do with your approach and your mentality around them. But based on the information you've giving, I would suspect this is the case.
And ofc they have less baggage. Most girls who put that much effort into their looks and being considered "high status" by everyone around them are on average, far more insecure than your average women.
I also noticed that, despite being a bit introverted, being aloof kills my game. I usually have a male social circle who are considered extremely good looking, and they play the aloof card extremely well. But for me, more results are there when I become more social and talks to everybody, than being my natural self and be a bit aloof.
Yeah. Again...being good looking helps with the "aloof" card. Because in our culture, being "good looking" is related to being "high status". Not as much for guys as for girls. But this dynamic still exists. And only "high status" guys can get away with playing the "aloof game". So when YOU try to it, you might look a little silly (unless you have something else to boost your status, thereby compensating for your lack of good looks).
Having said that, I think that this can work for any guy if he's doing it right. I'm almost sure they're doing something you're not. You might not understand their "aloof" game. In fact, you might be doing something entirely different from what they are, and you just think its the same. For the ^ reason. Either way, it sounds like being your genuine self is working better for you. Which is a good thing. Cause you're being more authentic and congruent instead of being something you're not. So just do that as your base, then work on improving it. There are multiple ways to skin a cat. You don't have to be like your friends to be successful.
Also, I think being aloof usually doesn't work on the highest quality girls. Works better on mid-quality women (like most the "hot" girls you speak of). Most girls who are actually confident don't care for guys who play games like that. They'll see right through it and it'll come off as insecure. They'd much rather you confidently show genuine interest instead. Note that this does not mean "chase them around like a puppy and tend to their every need". It means "express interest unapologetically. If they respond positively, great. If they don't reciprocate, you move on".
4. Is it good to date Instagram girls? They become extremely worried when people comment of how odd looking couple when we get together. Any specific tactics, or avoid altogether?
Depends on what you want out of dating and girls. I usually wouldn't. Most of them are very superficial and don't really have much going for them other than the fact that they're considered desirable and "high status". Also, they're usually emotional wrecks. Those are just my preferences though. Ultimtely, you need to decide for yourself if you like them. There's no intrinsic "good" or "bad". There's only "fulfils your needs" or "doesn't fulfill your needs". I will say that if you care that they don't have as much emotional baggage...then I would absolutely avoid dating most of them.