I was against signing Shaq at first because he has been a chemistry killer over the past few years, on his last teams (L.A, Miami and Phoenix) but he didn't cause any locker room trouble in Cleveland so...
The more I think about it, the more I'm excited about Shaq joining the team. I was concerned about his ego and the role he would want to play on the team but since he has agreed to the veteran minimum, and presumably a backup role, it shows that he has accepted his limitations and will not get out of his new role. He is now a complementary player and he seems to have accepted it, I can't wait to hear what he says in his press conference.
I like Shaq's personality off the court, although he did a cheap shot to Nash by stealing his TV show idea...
Anyway, I still don't like the fact that Shaq's pick & roll defense will be atrocious and that he is not much of a defender, but I'm really excited to see that the team finally has a really good "replacement" center in Perk's absence, and, most importantly, and finally, the low post presence we've badly lacked these past 3 years!
It will be awesome to have Shaq as an option to score in the paint with his post up moves when our offense is going south and we can't score anymore. It should really help us and open up the perimeter too. I really like the offensive game/dimension Shaq will bring to the team, and I hope Rondo and the other guys will cover his defensive weaknesses.
And, although he is 38 years old and the other guys are old too (or recovering from an injury), a frontcourt of KG/J.O/Perk/Baby and Shaq will be HUGE! Miami's thin frontcourt will get exposed and crushed big time.
Plus, we still have Sheed's contract to trade for a scoring wing or a guy like Shane Battier... awesome trade chip (I was against using Sheed's contract to get Shaq).