I'm the sort of gamer that tends to stick with one or two games at a time that I play until I'm ready to move onto something new. Sometimes that means I just loose interest midway through and never go back, other times it means I play the same game over and over again.
For example, I've played through most of the Mass Effect and Dragon Age games an embarrassing amount of times. Seriously, for ME 1 & 2 I think it must be at least twelve playthroughs a piece, though only (I?) five or so for ME3. Five of so for DAO, three or four for DA2 and I'm about at the 1/2 and 2/3rds mark for my 3rd & 4th playthough of DAI. Only one for Andromeda though, not surprisingly. I'm not sure if SWTOR counts since it's an MMO, but still I've gotten about 8 characters up to level 70, which is a lot of repeat gameplay, one way or another.
Back in the day I played an ungodly amount of TF2 (before ti went f2p) and L4D 1 & 2 (until the community and playerbase turned toxic.)
Also done multiple playthroughs of the 'Saints Row' games, 'Beyond Good and Evil' at least four times, 'Psychonauts' at least three times, and of course just about every old Lucasarts adventure game more times than I can count.