Agreed, Sea World is super boring! We left feeling like we just visited one of California's worst tourist traps.
I went there about a year ago with family and friends and I remember that a 1-Year Annual Pass was included in our park fees. Not only did we leave early because we were bored, but we didn't go back. Worse yet, the kids didn't even like it.
Monterrey Bay aquarium is absolutely awesome, especially the jelly fish and sea lion displays. I was also very impressed by their tidal wave display. It's neat to see that they spent the time to focus on this fascinating part of sea life. The deep-sea creature display is also very interesting.
When I went there, I was given a special tour of their water processing facility and procedures, as it relates to the bay water. It is fascinating to see how they have to clean out their plumbing by the use of "pigs", which are basically huge plugs that they insert in the system (while in operation) to scrape the barnacles off the pipes.
You end up feeling like you're really connected with the Ocean and I think they are doing and excellent job of educating poeple on just how important the Oceans of the World are.