yockee
Veteran
The puzzles ottozing just mentioned are the main ones that I would recommend. Also, If you are going to get a 2x2 I strongly suggest a Ghost Hand. Tower cubes are also quite fun to play round with. (I don't personally own one but I have used my friends and it is surprisingly quite fun)
For the most part, anything other than a type C (wit two) for 2x2 has become obsolete. No one really accepts Ghost Hands, Lan Lans, East Sheens, etc, ever since the Type C.