Your confidence.
Let's face it, I've said this time and time again on this forum, but different people look good in different things. I don't like vans or skinny jeans and won't be seen dead in them as they don't suit me, but other posters like them. I personally prefer to avoid t-shirts now as well, as they don't really suit me any more. Clothes alone don't get the love hearts in the eyes going in women, trust me.
Seriously not a good idea to base your dress sense purely on others' advice. If you take just a few minutes each day thinking what to wear, you'll have tons more wisdom on your own dress sense than any girl will ever have in passing.