The modern grey 24th Century uniforms are the best!
I also liked grey and white uniforms worn by the Voyager crew who were in that one alien race in the episode called "Drive".
I also liked the recent white dress uniforms as seen in Insurrection, as well.
And I did like the Original Series film red jackets with the flap in the front, too.
And the Voyager style uniform with the grey underneath was pretty good, too.