MGM here too. I thought I'd love the place being a big movie fan but I felt claustrophobic there in the summer heat, whereas I was fine in the other parks (hot but fine). Are the streets narrower or something? Sunset Boulevard felt totally congested at all times. Also trying to keep track of the show times and trying to see them all is just so stressful, lol!! It's hard to take an afternoon break too with the shows going on. I thought we were just tired but we went back for a second day and I felt the same way.
Just to add, it's not the attractions I didn't like - they're great, RnR, TOT, Playhouse Disney, One Man's Dream and The Great Movie Ride and more.