I'm not a fan of their personalities... too mature for my liking. A dog that's well behaved for no good reason creeps me out 
I also don't like "having" to get a dog groomed. A GSD will look fine if you neglect them even for a few months but a poodle must be kept up or you'll look like a bad owner. This also gets really expensive. Our neighbors spend $120 every few weeks for a bath and haircuts. I can think of much better things to do with $120 for my dogs (that they actually care about!)
I also don't like "having" to get a dog groomed. A GSD will look fine if you neglect them even for a few months but a poodle must be kept up or you'll look like a bad owner. This also gets really expensive. Our neighbors spend $120 every few weeks for a bath and haircuts. I can think of much better things to do with $120 for my dogs (that they actually care about!)