Kung Fu Weakness' - Please help

Hello all;

I was hoping that someone here would be able to tell me what martial art, if any, Kung Fu struggles against. Is there a style that you've found difficult to spare against personally? Something that just seems to... get under your defences easier than any other style?

I know, its a little unorthodox; however I do require this information.



So, since the internet is a place for sob stories:



My brother has trained in Kung Fu for a long time. I'd imagine that he's quite good at it. He tends to be at anything he does. The problem being, for me, that he used to quite like hitting me when we were younger. Of course, out of fear, when he started learning martial arts my only thought was:



"Great. Now he knows how to hit me properly"



So I since ceased any confrontation with him. I did not talk to him, and if he ever entered the room, no matter what I was doing- I left. In the middle of a game online? Doesn't matter I left.



Now, in my mid twenties, I'd quite like to get over my fear of him. I could, of course, go and learn Kung Fu... but as he has years of training on me, that would be rather redundant. Yes?



Obviously I need to find something that I'd be good at... something that has agility, maybe? Something that's more of a moving around style than the grounded Kung Fu?



TL;DL: I'm so tired of living in fear of my brother... is there anything Kung Fu is weak against? For my own peace of mind?