I know ID4 wasn't a great movie (c'mon, the aliens don't have a firewall? And a host of other things), but at the end of the day, if I turned my mind off, I found ID4 to be quite fun and enjoyable to watch as a silly alien action movie. Oh, and Will Smith. Because he was awesome.
And although I want to NOT like the sequel (because sequels always suck), I can't help but get a little excited when watching the trailer: https://www.youtube.com/watch?v=GqAllf_BKEw
I hate most Michael Bay films because they exist solely on how big an explosion he can make, but I'm kinda hoping that ID4:2 will be little else than aliens blowing stuff up, Humans firing lasers at aliens and Jeff Goldblum...being Jeff Goldblum.