I absolutely don't regret being a feminist.
As a PP said, I wish I didn't have to be, I wish there was no work left to do, but hey ho.
As a female powerlifter I often have to "justify" my interest in the sport, as it's not perceived as lady-like. And once people (of both sexes) get over that, they struggle to reconcile this with the fact that I usually wear dresses and high heels and make-up. So this is my own little crusade at the moment 
But, there are things I really can't manage to get offended by, like engagement rings, being called a girl rather than a woman, or being called "love" or similar. So maybe to some people I am not a "proper" feminist.
I am proud to call myself a feminist ; I believe in equality, and I intend to bring my DD up to be an independent woman. I encourage her to do what she fancies, whether ballet or football or whatever else.
I donate time and money, and I sign petitions to try and stop all sorts of inequalities.
I don't think you need to agree with all feminists to be one. Just do your bit :)