Truth in its self is an interesting conception. If it were a being of flesh and blood we could then count him to be a villain but it isn't. Truth does not go out of his way to be cruel. It merely does as it was meant to do; show the reality of things but for a price.
It would then be foolish to say that I hate it for doing hat it did to Izumi, Ed, Al, Roy, and (possibly) Berthold. They made their choices and paid for it dearly (well not Roy; Roy didn't choose, he just got screwed over.)
As I said Truth is a very interesting thing.

Truth was very interesting and I second what XxLostAngelxX said here!

Really nothing SO interesting about him.

Nah he's on crazy God! But i'm really mad that he took Roy's eyesight when he didn't want to open the gate! That wasn't fair! I sometimes like his personality , like when he first meets Ed and laughs and when Ed makes his final transmutation and Truth is epicly happy.