Crowds
I hate getting into a MLL and finding it packed. They should be for Elite, Super Elite, Star Alliance Gold, and Business Class. Anyone not in one of these categories should only be allowed in with a pass that comes as part of the Altitude package (ie. SE gives her husband and colleague her 4 passes). I hate that AC sells annual access to lounges for only a few hundred dollars, or offers access as a cheap add on to flex or latitude tickets. I especially dislike that credit card holders get passes to use on reward tickets.
Its just sad when the lounge is like a zoo, and all the FFs wait at the gate because they can't stand this formerly exclusive perk (YYC especially...).