Sometimes. I am now on my third playthrough on ME2 and I have a huge pile of games I haven't touched yet. I have no idea why, but for me it is hard to start a totally new game nowadays.

I do, I played evey game I own at least twice,but, I change the difficulty to hard mode the second time around.

I kinda have a problem with restarting some games, I restart it then play it for a bit and when I want to play it again I forget my place and restart it again, I think I restarted dark cloud 1 and 2 atleast 4 times each and only beat them once, so yeah lol, which is kind of weird since I'm kinda into the once it's done it's done thing too, but then again it's not like I got 100% on them so they weren't really done, so yeah, I really hate miss-ables in games though, oh and games that you can't start on the hardest difficulty 

It depends on the game. If it's Tales of Symphonia then I would play that on My Gamecube when I own a PS5, or Uncharted 2 on my PS4. Overall there aren't many games I'll replay over and over again, only the truly amazing games.

I replay most of my games. The ones I dont are the ones I gave away to a friend or I did not like them enough to finish them in the first place.

Yeah, I preffer to play TLOZ: TP than MH3 when I got them

This happened to me with Secret of Mana and Parasite Eve, but it was for school and university motives. I think I started PE three times until I finally beat it.