Guess I should pipe up on my opinion. :B
I actually liked Plasma the second time around. My thing is that I just hated the first's philosophy on what they were doing. They were stealing, hurting Pokemon, doing all of these horrid things, and then justifying them all by saying "we only r halping pokemon", when in reality they weren't JUST stealing from people who are horrible people, they stole from the innocent such as Bianca, who does nothing but love and cherish both her Pokemon and friends, and yet tell the public that it's what the Pokemon wanted, when it was clear that Munna was more than excited to be returned to Bianca. Ghetsis was an incredible speaker, don't get me wrong, but his actions and his visions were pretty clear from the beginning, that he had no intention whatsoever to help Pokemon.
Team Plasma V2 was just straight up, "We're taking over the world." Some of the grunts still had the idea that it was for the Pokemon, but they weren't giving any BS justifications for it. They wanted to rule, so they created chaos. I'd rather a team who is outright honest and evil, rather than one who cries because their Pokemon are in Pokeballs. Plus, Ghetsis' madness at this point had hit a critical limit, and it was nice to see that.