Well, when you sit & think about it: If everything ceases to exist, there can be no suffering. Isn't real happiness the absence of suffering? Basically, I think perhaps both Yuna's side & Seymour's side were trying to reach the same end through different means.

As to whether or not that makes him evil: Well, I guess you'd have to determine whether the ends justify the means, eh?

Not to stray too far from the topic, but I can agree with this idea. Of the whole scenario you have your two extremes (Jenova > Sephiroth & Sephiroth > Jenova) & then you've got your middle-ground (Jenova = Sephiroth). While I'll never accept a Sephiroth > Jenova theory (regardless of what a producer says, being as how they don't have the backbone to go against a massive Sephy-fangasm), I'm more than willing to accept the middle-ground idea & say that their relationship was simply mutually beneficial.

I think that Seymour had a more vindictive thought in mind when he wanted to "save" Spira. I believe that he was merely sugar-coating the fact that he wanted to take revenge on everyone who had treated him poorly throughout his life because he was half Guado, and half man. He blamed his father for not being able to protect him from that, and he blamed his mother for leaving him, (although he got his first real taste of power when he got the Aeon, Anima).

So IMO, Seymour was an evil villian. But he's the type of villian that tries to make you feel sorry for him, or relate with him. Not really a likable villian IMO.

But then again Seymour never wonted to turn his mum into anima. But i guess his a bit of both because he kill his father and such but he was misguided a bit because he killed his father because of his mom (because his mum gave him power, so he wonted more) so half i guess.