I like both, but tend to lean towards simple rules of 80's games.

As I progress through a deep rule set game, the tension just builds and builds. Then you get all the joys of completing the task, or all the crushing defeat of ball drain. Total rollercoaster of emotions. Usually if I go far into a game and drain ball three, I am unlikely to start all over again right away.

Games with simple rule sets are just plain Fun. No pressure to complete mini wizards to get to final wizard mode. Just flip, drain, repeat.