I guess I'm old school in wanting just a regular three-course meal. The long sitting, the large amount of courses (which tend to rather rich all the way through), paying a hefty price for what they decide served you (instead of getting what you want). It just seems like the tasting menu is a little pretension as well.
However, when it comes to sushi/Japanese cuisine, I don't mind an omakase setting if they have the quality products and the skill to back it up (as long as you have a la carte restaurants to go with them to pick from).