Same for me. Learn the damn songs!
Similarly, one of my bandmates would constantly say stuff like..."we are a cover band not a tribute band, so we are going to do songs our way". Well, that so far has translated into alot of half-assed versions of songs. Alot of people hear that and think, oh, ok, cool, Ill just listen to it once or twice, get the basic gist of the song and then wing it. He started with the "our way" yesterday at practice as a matter of fact and I feel like Im always the one to throw cold water on them and say that you still need to learn the songs well. If you want to embellish a little here and there, fine but the structure and main details need to be there.
The other thing, like twofingers above said, are the setlist choices. We have a new singer and he was suggesting new songs he would like to add to the existing setlist. Only one of them was a big hit (Pour Some Sugar On Me) and even then, we dropped that song in my previous band because it sounds so empty without all the production. The others I have either never heard of or were minor hits years ago. But the other guys were all excited and I again had to stop them and say that we need better choices. Its a definite problem that the rest of them just want to add "a cool song Id like to do".