It bothers me that Data haven't got any casual clothes besides the starfeet uniform.
This is a fair observation, & while I'd have liked to see him mix it up at least while he was dating Jenna Desoto, I think that he didn't is the whole point of that episode... & of maybe Data, on the whole. There is no casual Data, as he is during this time in his life. Maybe in the finale's future, or in the movies, but not really in the show.
For that matter, did ANYbody have casual clothes for off-duty? I seem to recall some from early in the show, but that dropped pretty quick. Yep, here I am just lounging around, playing poker with my pals, in the same damn official thing I've worn all day...
I'm going to assume we're discounting at least two of Troi's most frequented outfits, the maroon with black trim, & the purple with lavender trim, which she used in place of a uniform, & in general I'm assuming we're mostly looking for casual outfits during down time aboard the ship, because there's countless times they are out of uniform when they go elsewhere. Here's what I've come up with, & some actually reappeared. I also might be forgetting some. All in all, we were better off that they didn't dress casual much. Some of it was atrocious.
Picard be digging that v-neck pleated diagonal matador look a LOT
It sends the clear message of... "That's right... I have gray chest hair"
I could stare at this lady all day long. That bottom right pic
looks like a shiny shopping bag, & she still makes it pop.
They found Bev some interesting stuff on occasion. Struggled finding good colors for her though.
Pea soup is not a shirt color. The blue looked nice, & she knows how to work that bronze dress
A few oddball duds for the dudes. Honestly, if Worf wore traditional
Klingon casual clothes, it would probably scare the hell outta people
& then... let us not forget the Laforge Casanova Collection. He dresses like he wants to be mistaken
for a piece of furniture. But hey, I've seen that VISOR feed. It ain't helping much for color coordination