Some of this I think I've mentioned in other threads, but I'll mention what I can remember here...
My wife never played much before we got married, altho she came into the marriage with 3 NES consoles each with ONLY Super Mario Bros. (lol)
Once she got the hang of the PS1, she played the Namco Classics, Activision Classics and a few other "arcadish" games....
Then, when I got the PS2, I tried buying games we both would play... (the Burnout series, Jak & Daxter, Ratchet & Clank)...
THEN.... I built the MAME... she really got into Galaxian, Galaga (and their many variations)... and then I got Gyruss up and running... and it's been tough getting the MAME back from her... she's got the top score ( currently at 355,200... I think) and isn't looking back....
She's also into Final Fantasy (having beaten FF7, FFX and has a save in FF6)...
Not to mention stuff I've downloaded like Hamsterball, Bejeweled, Dynomite and the downloadables from
http://www.kewlbox.com