The FC/DS9 uniforms are my favourite - so much so that when I decided to make a uniform for a costume party, I made myself a FC/DS9 era Science officer uniform
I'm also quite fond of the VOY/DS9 uniforms, TWOK/movie era uniforms, and well - who isn't
a fan of TOS uniforms?
On the other hand, I've never liked the Motion Picture uniforms - bleh! And the Enterprise uniforms are average at best...