Hello, yes I can understand disliking your own voice, it happens to me regularly. I find the best thing to do is forget about what you're doing and really ACT. Just really put the effort into making yourself sound different, and don't be embarrassed to sound like a complete fool, because that's what gets results when you're recording your voice and applying it to a character. As for filters, I highly recommend the ' Cool Edit Pro free trial '. It's not a long term solution, but it's all I can recommend at the moment.
Good Luck, Ludamage!
Haruken
hmmmm...