It depends... when I want to play a specific game again, I just play it. I've beaten all the Zelda games I own several times, and I'm not someone who rushes games or do speedruns, I just don't think it's fun that way. I tend to always try and do everything, search every little corner and everything, so I always take a lot of time to do one playthrough. From memory, I've gone through TP at least 7 times, WW and MM more than 12 times both, OOT more than 15 times, since it's been 11 years I own it already. As for LOZ and AOL, I've beaten them approximately 5 times each.