I would LOVE to have a Cav one day. I very nearly ended up with one a few years ago, from a stellar breeder, but got Virgo back instead.
I just love how sweet they are, how friendly, how they can go from chill and snuggly to wanting to play in a heartbeat. I've dealt with Cavs that were anywhere from 14 weeks old to 14 years old and they just make grand old dogs too. Of course, most of the breed is riddled with health issues, but there are some very conscientious breeders who are working very hard to get those out of their lines.
We had a billion cockers come through the resort and some were ok, the rest were some type of crazy-ass neurotically insane. Or just very, very dumb but super sweet at the same time, which was funny to watch. Of course, I don't think a single one was from an even half-way decent breeder.
The Springers I've met...some are cool, most are just like "WTF? SETTLE DOWN!" Then again, hunting/gun-dog energy just grates on my nerves anyway, so I'm slightly biased. Same with Brittanys, but it's already been mentioned that they're not really spaniels.