Boring in bed can be cured, because that's more of an emtional thing than anything else. Studying a Kama Sutra book together is one way to treat that problem.
I agree that if a man and a woman are going to be together, she should be included in major decisions, but to get there with me, you have to be trustworthy, and by that, I mean not selfish, manipulative, or brat-ishly entitled in your mindset. If you're my best friend and my love and I can trust you to be about our collective benefit, I've got no problem with making you an equal voice in the relationship.
As far as being mean, that can go both ways. Many times we're accused of being mean when we aren't. Now if a brother is verbally, emotionally, physically, or mentally abusing you, then yeah, he's mean.
Cheating as a reason, I dig. But be sure you don't make it easy for me to go cheat before the temptation arises. I'm not saying that's an excuse, but you should realize that how you treat me has as much power as the way I treat you. If the relationship we have is strong, the communication is strong, the trust is strong, the encouragement I get from you is strong, and I know for certain you'll never do anything to tear me down, ain't no way I'm cheating. I can fight a horde of a million succubi with no problem. You cut me down with your words over a mistake, act childish with communication, become untrustworthy or treat me like I'm shady, etc., the strength of your negativity towards me determines how fast I fall.