L,
I normally look for imported stuff and look for a similar style or get it imported if I can't find it anywhere else.
From time to time I look at some fashion blogs but that's probably the extent of my research. My style normally fits/suits the style like in the jacket above. As for shops I normally have a good look around, not much to it.
Shops you really just look around, current T shirts are old gaming tee shirts still in good nick.

Sometimes I go on Zazzle for funny tee's. It really ranges, for example quite a few of the long sleeved shirts are from GAP or something but look like this:
Note With Designer stuff: The average individual isn't really going to notice. They'll look at the overall style so don't bother with designer unless it's a specific item you want.
For fashion, I think subconsciously I just have good taste? I've never been too fussed as long as it suited me, only really nowadays have I really looked how it fit my frame as I'm becoming more lean than I already have been.
I suppose it was justing seeing girls that are well dressed too? I found hanging around some girls isn't too bad for getting fashion references, when I was really dense I never wondered why they kept on making me try clothes or watch them trying clothes. XD So dumb... I was like alright, it suits you/me.
So I think it's a combo of subconscious, seeing girls and hanging out with a few girls?
As for sense of style, I think on average Asians are better dressed compared to British guys at least in here. Especially when comparing cities, when I was in Hong Kong or other major city the males are a lot better dressed. The exception being the higher end of London as it's a fashinon central where it's about equal.
As for the girls, girls I go for put quite a bit of effort in their appearance. Unless we're doing physical but even then they still manage to look hot. Most cute/hot girls will put a good effort into their appearance so not much can go wrong there.
A good sense of style can put man into many girls crosshairs as I found that the 'gap' between how stylish men and the average joe compares is pretty big in most countries. With girls there's not so much a disparity as the average girl has a decent sense of fashion.
I have some glossy trainers, gloss adidas originals but they're used for jeans and some shorts. For trousers other than jeans I go for a more matte look, just personal preference I don't really have a reference for pairing up glossy shoes when it comes to the trousers we're on about.
Good stuff that you worked for that V, for V shaped frames now that I'm looking more into it I find it very hard to fit an athletic body. For jeans it's the quads and shirts or tees it's armpit area. Nightmare, so really have to look around. In the UK only more recently have athletic builds been more tailored, the slim-fit stuff doesn't 100% work.
I guess for East Asian styling that sort of frame has been recognised as most of the more muscular male models have a more pronounced V shape.
Any more questions just shoot them, currently just slaving away to finish my last exam for the year.
If anyone else has questions about fashion be sure to help them out as you've got good taste too L,
Glitch