CSI (the original) is actually quite watchable. But it's still very formulaic and most episodes end up being very similar. Miami sucks for the same reasons (why do we need the same show with a different backdrop) plus everything you've said. I also feel the same about CSI:NY. Then we have NCIS, which has a decent cast, but it's really just another similar show. They do well for CBS, so they just spin them off.

CSI
CSI:Miami
CSI:NY
NCIS
NCIS:L.A.
Cold Case
Criminal Minds
Criminal Minds (Suspect Behavior) spin-off (confirmed/coming)
Without a Trace
Numbers
The Mentalist

Of course NBC is spin-off guilty as well, but at least the two I'm thinking of (Law and Order, SVU and CI) are somewhat different than the original. They both completely suck, but they're different.

ABC and Fox are the only two of the big four that have done anything interesting every year for at least the past 5 years. But their churn is extremely high. On the one hand it gives new shows a chance, on the other, you never get to watch anything to conclusion.