True, personal preference. Like Fandango chants, Ziggler cash in and Ryback heel turn happened post mania 29?
WM 28 was Tensai debut, Lesnar return, start of the YES! chants. Nothing really beats Lesnar in terms of reactions.
Lesnar got a great return reaction after Wrestlemania 28, but the post Wrestlemania 29 Raw, everyone got a great reaction, including people who weren't even there. Even Olr Anderson had a chant.
I'll always remember that Raw because of the fans' energy. From the opening bell until the end, it was a continuous 3 hours of cheering.
You're definitely right though about it being personal preference and it was awesome seeing Lesnar F5 Cena 24 hours after the Rock beat him. I just can't recall a single Raw in history with a crowd reaction like the one after 29. I don't even remember the matches, I just remember the fans.