It all depends on what looks good on a guy. For example I have some friends that look really good in tight pants and yes it can be a turn on. But say your on the hefty side, common sense here DON"T WEAR TIGHT PANTS lol as for v-necks I like them.
Your style is your own. Wear what you want, how you want, when you want. Someone who isn't afraid to do their own thing style wise is huge turn on. Wearing something just because someone else says its the IT thing to do or for someone else is stupid and completely idiotic if it's uncomforable.
v- necks look so gay on a guy. I hate v-necks. every time I see a guy with a v-neck I automatically think he's gay or bi. so if you are then no problem. but if your straight I suggest you stay away from them. tight pants are ok. but not too tight. they have to be a little baggy.
i honestly think its a turn off when a guy wears a v neck, I consider that a girl shirt. I do like tight pants on guys as long as they don't have really fat legs or extremely skinny chicken legs. . so if you can work it its hott
V-necks are fine. I think guys in tight pants look really good but it's fine if their pants are baggy or fit correctly. It all depends on the guy to me. Plus, I tend to go for personality more than looks.