You should have a look at MotoGP. 2 wheels as opposed to 4, but it delivers on many race weekends.
For some years I would watch both, but then I just got bored of F1 and only kept watched 2 wheels. Now I don't have so much spare time and when I do I prefer to invest it I other things, but once in a while is always funny to watch a 2 wheels race (motogp, superbike or anything really)