I do sometimes, like if I really want to discuss that topic and question. Sometimes I don't but I actually like responding and not being kind of flat and boring online. I like to talk a lot in person and I'm no different online. lol
I like discussing things with people in general, but rarely do I get people to reply back in real life as well as online. Perhaps, I am just not good at it, or I am just a terrible person that everyone just wants to avoid. LOL
I will thank a person for taking the time to answer. I may ask for clarification about their opinion. I may correspond back and forth if there is a good conversation there. And I take the time to go back after a fair amount of time (sometimes three or four day, to allow all the chance to respond) so that I can select a MHO.
I reply to most answers. Only way I won't is if their answer is really ignorant and I don't feel like arguing with a dumbass, they didn't give me room to say anything other than "ok", or there's too many answers and I can only reply to the most interesting ones.