Depending on what you want, I think you get the most out of a big ride without "warming up". For example, riding Dragster on opening day was amazing not only because it's a crazy ride, but it was the first roller coaster I had ridden since October. About the lines, I think you get the best ride for your wait in Magnum, because it's never over 45 minutes, and usually less than 30. Also, Raptor usually has a decent line, but it has the fastest moving line in the park, so you probably won't wait much more than an hour. PT generally has a short line (especially the space shot), and WT is never bad. On the long line side, MF, Mantis, and TTD usually have pretty good size waits. I'd suggest grabbing a freeway pass for Mantis and MF so you can either get multiple rides of these in or so you don't spend a decent chunk of your day in line for them, although MF's line is worth it, Mantis's might not be.
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CP 2K3: 8