Skin tones like nude, tan, beige or taupe are my favorites. After that would be black or off black. I agree with you, that it's fallen out of style somewhat, but I do wear some kind of hosiery all the time. I love the feel, look, and how "finished" they make any outfit look.
I wear skirts a lot, so I wear tights a lot in the winter. I usually wear black. I mostly wear black anyways so they just go better. Once in a while I'll switch it up and wear colored ones or tights with funky prints. If I'm going out in the winter and wearing a cocktail or semiformal dress that's not black, I'll wear the normal tan ones!
Depends on what color the rest of my outfit or shoes are. I like to to be more fun with those colorful tights, but in the end I always end up with darker colors. Black is the most often that I use. Other than that I've also worn blue, grey, maroon. In summer I wear thin nude ones.
I wear black usually... I like pantyhose... I feel like it just looks better than bare leg.. plus I'm always worried my skirt will blow up... which it sometimes has... so it's good to have something extra covering down there