I like what I've been able to make a little money on, is fun to play, has a good beat and is fun to dance to. (And if you don't get it... never mind... LOL)
Favorite MG: Ladies Nite (though she hasn't put out lately), Halloweenies (Slotster, I cashed out $400 last week off a $10 bonus playing this one), Fortuna, MegaSpin High 5. And I have this weird, unexplainable weakness for What a Hoot since I hit 5 of the damn things last year, and it hasn't turned loose of any hits for me since...
Worst MG: Pollenation (I've rarely hit a bonus round and when I did, I invariably hit the Stop on the first pick)
Fav RTG: Aztec (he hasn't put out lately, either LOL)
Worst RTG: Goldbeard (don't think I've ever hit a bonus round on it), with the newest slots gaining on him.
Fav Playtech: Dr. Lovemore is great if you can get him to give up some bonus rounds when you're betting $2 and up, retriggers are not uncommon. And I have a fatal attraction for Vacation Station.
Worst Playtech: Whatever that one is with the troll and the lanterns.
Oh, dear... You just wanted us to name 2 games. Sorry... It's too hard to choose just 2.