Yellow gold was THE bomb when I was in college 16 years ago...and that was also the same time that silver/white gold started to creep up in popularity. Starting in the early '90's, white gold and platinum started to replace the yellow gold wedding sets that had been in vogue for about 20-25 years. I haven't seen any recently engaged couples with yellow gold wedding sets since WG/platinum still dominate, but it's been refreshing to see yellow/rose gold in just about every other kind of jewelry!
Yellow gold is so warm, lively, classic, and flattering to just about every complexion. I love it! My wedding set is platinum but ALL the other jewelry I've been wearing lately has been yellow gold.