Most are rather boring, but the 75 is quite an entertaining ride, but any ride is when doing a more difficult approach, such as ones to LGA, DCA, and SNA.
I wonder, also, what SWA will use for their next-generation a/c. Maybe if Boeing can get the 737NG to be a bit more efficient, that could help, but what people don't realize, is that it is already an efficient a/c, and doesn't need much improving. It's the top of what is efficient in that category. I dislike, however, the "757 replacements" that are offered, I think nothing can ever replace them. Except for another 75. I do wonder, what if SWA dumped their 73s when the 75's came out, and only had those, I'd love to see those racing around Sky Harbor, due to their, what seems like very quick taxi speeds.