This WCIF may sound weird, since I think most of Sim clothing is for adult females, but most of them is so... what's it called... womenish? while I'm looking for basic, guy-like jeans and hoodies. Like download number 8 on this page. Although that isn't exactly guy-like. Somehow I like it.
There are a lot of tumblrs that reblog CC finds, most of them represent what the owner of the tumblr likes. Just some tumblrs to get you started (I don't know what style you like, so excuse me if some are a little too cartoony for you.) Trapping (also known as Jedpie) did a lot of gender conversions and although she made very feminine female clothing now and then she also made a lot of basic, gender-neutral or even tomboyish stuff. If you find a broken link, try finding the CC you want in the back-up linked in this post. Amaryll (also on Tumblr), again, certainly some dainty female stuff but also more neutral clothing. MDP definitely loves the kind of high heels that make me sigh in disappointment, but has converted more casual clothing. Some of them don't have morphs (fat or pregnant states), but that's fixed slowly by MDP and others. DeeDee has recently been on a dress making spree, but definitely also makes casual clothes for adult females, plus she does a lot of conversions for teens and elders too as a bonus (and fixes of MDP's meshes).
Or try Sanneke, Skell's repository project has age- and gender-conversions and just separated versions of EA/Maxis outfits (her main downloads are pretty feminine though, you probably won't find much what you're looking for), the people at UYS, or SerenityFalls/Mel (has done hoodies, specifically!).
The forum Garden of Shadows has lots, a lot is shared in event threads: http://gardenofshadows.org.uk/garde....php?board=17.0
There are so much more people that I can't think of now, but if you like Sims 2 Cri, then I think you should check especially Trapping, Amaryll, UYS and Garden of Shadows. Good luck!