I'm going to ignore my friend after we hangout.
Why are you going to ignore them?
Our personalities don't match and I don't want to be friends anymore.
If you don't feel your personalities match and you don't want to see them anymore, that's perfectly fine. You aren't obligated to be friends with anyone. I think it would be best to tell them how you feel though rather than just ignore them.
Yeah, maybe you're right.
I think both you and your friend will feel better about the situation if you're just honest. Both of you will feel better and leave the relationship at least having a sense of closure.