just examples: Coded Arms, MHFU, MGS Portable OPS plus, Dissidia Final Fantasy, Warhammer 40k squad command, GT Portable, GTA, Phantasy Star Portable 2 (months ago I checked and the official servers were still up), just tell what games should I get, they are cheap now, it won't be a big problem for me to find a used copy. I'm also willing to start games/series I never played if you really want.
I tried today MHFU because someone was playing it at the moment (other rooms have little population), worked very well for me.
edit: Metal gear ACID 2 is nice too for me.
Persona 5 on PS3, I won't need next gen!