I've made it a habit to always thank the Question Asker if they select my answer as Most Helpful. I'm aware that some people just select any answer as Most Helpful so that GirlsAskGuys will stop sending them those annoying messages (no offence) lol. But if someone actually took the time to consider all the answers they received and chose my one as Most Helpful then it would be common courtesy to thank them. Similarly, if someone thanked me for choosing their answer as Most Helpful then I would I would say "you're welcome" or "no problem" just out of politeness.
How about you?
Most Helpful Girl
I mostly do. The only time when I don't is when I'm the only answerer, so the QA doesn't need to choose anyway hahaha..
But I sometimes don't reply after the MH thanked me. It depends on the answer. If it really was the most helpful, then I'd state that they deserved it. If it were just because I had to choose one and I picked the one with the longest answer (more effort given), then I don't reply. Unless I've talked with the user before, in that case it's always nice to say "you're welcome" or something.0