My girlfriend is a very very picky gamer.  She loves the old original Tomb Raider games (PC versions I believe.  I think she liked the controls better) and she likes the original Super Mario Bros. and Super Mario Bros. 3. 

I have to say that she does not like the new Tomb Raider games because she does not like the way that Lara Croft looks compared to the old games. 

So, based off of this very little information on the couple of games that I know she likes.  What can you recommend she try?  I only ask because I love to game with her, but I want to get her more involved with my favorite hobby.

What systems you own? Just a PS3 or more?

Uncharted? It's like Tomb Raider, but with a hunky male protagonist :P

LittleBigPlanet, Flower, PixelJunk Monsters, Puzzle Quest, VC - that what my wife likes to play/play with me/watch me playing.

Sorry, I forgot to add that. 

I've got a PS3, Wii, PS2 and Super Nintendo.  I also have a DS and a GBC, but she doesn't seem too interested in the handhelds.  I do have an NES, Genesis and N64 but they are somewhere in my mother's house so we can forget about them for the time being.

And I almost forgot, I've got my PC  =P

Little big planet

Yeah, LittleBigPlanet is a great choice it seems.

And I dare say Flower, but I have no idea from the stuff you told us

EDIT: Of course, LittleBigPlanet is tons more fun when you play several people, so I recommend getting a second controller (if you don't already own one) so you can play with her.

Super Mario Galaxy. You can even play it together with her, with the second player assisting with the pointer.

Can't go wrong with Mario Kart (Wii) probably the best racer that a girl could get into.

LittleBigPlanet for the Mario,

Uncharted for the Tomb Raider.