Easier to get in and out of, less overhang to scrap on driveway entry, and while i realize the Vette has a decent trunk space it's still not as useable as the others due to the high liftover to get items into the trunk....plus you can put the seats down in the mustang and M3 and you've got Massive useable space. When I take my M3 to the track I put a 12 x 12 canopy, 4 race tires, jack, jack stands, tools etc all in the car with me and go.
Again, I'm not stating that a Vette can't be daily driven...I've considered it many times and by no means would I not buy one because you can't daily drive it. Despite that, it's still not nearly as friendly as a daily as the other two. Obvioulsy the all around performance is going to be the best in the 'vette so you also have to factor that in.
Andy