That's interesting.
I've literally seen 600-800 bands in my six years in Austin. Over 1,000 in my lifetime.
While 90% of my satisfaction is based purely on their musical performance, there are little things like crowd interaction that may add or subtract from my overall experience. I do like when bands acknowledge how much they appreciate you. If they can add in some personal stories (a few sentences), that's oftentimes a huge bonus in making you feel a part of the show. Dave Grohl, with the Foo Fighters, is the master of this.