Yeah that was a ton of fun seeing Paper Mario and NSMB2, I love seeing someone who can actually play the game. Paper Mario looks INSANELY fun though, I can't wait to play it. Also hearing about the KH3D demo and seeing NSMB2 being two player and having a little challenge mode was pretty sweet. Castlevania looks pretty cool too.
Overall, this year's E3 wasn't half bad but I was way overhyped for it haha. I was expecting massive First Party IPs coming but I'm okay with there not being too much. There were actually a lot of titles I'm looking forward to overall. Pikmin 3, Luigi's Mansion 2, both New Super Mario Bros. games, Lego City, POSSIBLE Batman (because I already have it but it's BATMAN), possible AC3 as well, Paper Mario, KH3D, and Project-100 all have my attention. Good E3 this year though not the best. I think they just did so well last year I didn't know what to expect this year haha. Perhaps this year's Tokyo Game Show will yield more interesting titles
EDIT: Oh wait a second what happened to Animal Crossing?! D: