There's no option for multiple votes, so I haven't voted.
I like the JJ uniforms because they call back to TOS colours but more sleek and futury. Both the DS9 unis are good, but the earlier ones seem more practical in terms of identifying ranks, and less depressing because less grey. I don't really like the TNG unis, partly because the colours look off somehow, and partly because of the asymmetrical design.
The ENT overalls are appealingly practical, which also gives them a bit of a bad-ass look. I also really like that shoulder piping. Someone brought out an ENT-style bomber jacket last year, but unfortunately it was covered with stupid patches, and you could only get yellow piping (I'd prefer red, or blue in a pinch).