Did I make the right decision ?

[Baked]

I don't think this is a question you could really ask SF. Everyone will give you a different answer depending on how they feel about it and there really is no definite answer. If anything, I would agree with Deltron in a way.
My opinion? People who have completely opposite personalities can still have a successful relationship, and I personally believe that those personalities shouldn't get in the way of a relationship. A relationship depends how much you care about the person, how much you like their personality and a few other things. Depending on what you consider a successful relationship, I have had a few in which both me and my partner had completely different personalities. I think you could have given it a shot and you would have been able to prove your own doubts wrong. I felt the same way when I got into a relationship before with someone who was different from me, but now I can't believe that.
tl;dr: Next time, give it a shot.

I asked SF this question to see there thoughts, I knew there was going to be different thoughts from everyone. But that is what I wanted, I like using empathy and I like letting others use it on me, I was asking this question to see what "you" would do in this situation.

To be honest, I don't think your conflicting personalities should get in the way of a relationship.

This may seem a bit ridiculous to reference to, but if you've ever seen the movie Knocked Up, the two main characters are totally different. You may be able to relate to their situation, putting aside the plot.

Anyways, you shouldn't assume that your relationship is one that won't last. I believe you should give the relationship more time, and thought before actually breaking up with her. It may be something special.

I have seen that movie and that's why I gave it a shot, I just seen it as not working out. That movie is a good reference but they had a kid, totally different situation. We went out for about 3 months and I just always felt doubt inside me, as Knight told me. " Doubt is a bitch " and I couldn't live with it, so I thought I would be mature and end it before it go to far.

Thanks for posting your thoughts guys, really means a lot to me.