I'll have a go.... super skinny fit anything is going to look suboptimal. Avoid this look, especially with expensive trousers, jeans, suits, knits.
According to the world of menswear, everything is a staple... colorful field jackets, chambray pocket squares, navy double monks, seersucker suits. But unless you want to immediately spend $5-10k on quality staples, work with what you've got, and add some decent pieces, then go out and talk to girls.
Assuming you look your age, you could get away with the following without looking like you're dressed for church:
-jeans,cotton pants, or flat front wool trousers
-fitted button down (no tie, tucked)
-suede or brushed leather oxfords or boots
Anything more formal than this (e.g. polished wingtips, tie w/o a jacket) pushes into electronics salesman or toward full reatard mc territory, probably not the everyday look you're going for.
If you've got a decent linen, cotton, tweed, or flannel sportscoat, you can match it with any of the above if you want to get fancy. Note: an orphaned worsted suit jacket is not a sportscoat, but unless you're the scion of a wealthy banking family in Switzerland, you're fine if you've got the brass to pull it off. Make sure the shoulders fit.
Knits are good.
Leather jacket must be awesome if you're to wear one at all.
Find an alterations tailor and use them, especially for all the ill-fitting stuff you already have.
Military surplus for versatile outerwear on the cheap. Unless it's pissing rain or -20, cotton and wool will be fine, and a damn sight nicer than most hiking or snowboard gear. Once again, see your tailor.
There are a lot of BAAAD examples on the forums and online mags.