Eh, I replay all my games over the years but I will only do the ones I beat atleast once a year and Home Console only.
Donkey Kong Country 1-3
Super Mario Bros. 1-3 and World
The legend of Zelda NES-SNES
Metroid-Super Metroid- I think Other M is going to end up on this list. I enjoyed it a lot.
Sonic 1-3
Earthworm Jim 1-2
Golden Axe
Kirby's
Actually even doing this way is going to take to long. Atleast once a week i pop in a old favorite and play it and a lot them dont take long to beat. Plus all the times I have played them make it that much quicker. I could honestly easily list 100 older games I play every year. I play them as much if not more than the newer ones.