After a lot of trouble with delayed connections this year (as well as Delta decimating my reward points), I'm changing my strategy to flying direct flights as much as possible, which means a lot of Southwest flights.
Connecting flights double the chances of IRROPS. Plus, as others have mentioned, there's the additional time factor involved in connecting. So I'll be giving up first class comfort in exchange for more time in a comfortable hotel room. (A somewhat dubious trade, I admit.)