I think the Pets Rule show is outstanding, and my son and I almost always see it when we are there (which is pretty often). If you have a choice between Shamu Rocks and Believe, I would pick Shamu Rocks. Believe, IMO, is REALLY cheesy.
Check out the SeaWorld website for show times for the day you will be there so you can plan ahead.
The shark exhibit is outstanding, as is the Wild Arctic exhibit (which has a "ride", but you can skip that if the line is too long).
Oh I so agree with Pets Rule!!!!! So I have never seen the sea lion show so maybe I shouldn't be saying this, but Pets Rule is THE best show there. OK so I haven't seen the nighttime shows either. But over the dolphins and Believe, PR is the best. Love love LOVE it!
My brother and SIL live in SD and they have passports. SIL works in downtown, and brother works from home, and they have been known to have a long lunch, and go to seaworld JUST to see the Pets show. There's just something about trained cats!
Brother and SIL like to giggle at people watching Believe for the first time, but I gotta tell you, don't believe Believe's beginning. Ugh. (or the dolphin show, for that matter)
The Atlantis ride is OK, not worth a line. Wear a poncho; at the bottom there are buttons people can press (I think you have to pay a quarter to do it) to shoot water at you.
Food is expensive, do not eat at normal eating times or you'll have big lines. Kids meals come with a little lunch bucket that is cute. Budweiser beer is sold all over in plastic bottles.
The shark thing is neat, but smelly. There is something about shark tanks, probably what they feed them, it's just nasty to me. But it's still cool.
My brother has said that whenever he tries to plan ahead using the schedule online, it's always off from when he gets to the park. He's given up planning to that detail, and just does it on the fly with the map/schedule they give you.
You can't bring food into the parks.
If you order your ticket online, you can do it right before you head out. Bring the print outs, and use the scanner machines. Much faster than waiting at the ticket booths!
We've never even seen the Wild Arctic show. DS has been too short for the moving one, and they just send us into the non moving one, which seems like Soarin' without the fun seats. We just walk on through and get to the good stuff.
The arenas where you watch shows are HOT. Get waters, apply sunscreen, wear hats. HOT.
Even though I sound negative, I think, we really love the place! Last December they had a deal where you pay for one day's admission and you got the rest of '08 plus all but 4 days of '09, and that's what DS and I have. We've been 3 times so far since then, and that doesn't count other visits.
But on our first visit, we were really bummed about things, we saw the dolphin and Shamu shows and that was fine, but the day was just bleah. Then we went into the Pets show, and it turned that day right around for us, and we've loved it ever since.