Meh... I agree. Certain thongs look good on certain girls, at least it seems that way to me. In a general sense, yes they are overrated.
i like either thongs, or cheekies, because i personally love my ass lol. And i love boxer briefs for guys.
there is an ocassion for all types of underwear, I like boy shorts, anything that shows a little cheek. Crotchless are great because you're sitting there and it's kind of a surprise for your man.