J.K! Probably not. Personally, I like him, but I can see why आप wouldn't. He's sarcastic and conceited and can be a complete arse to every one around him.
I like him! But I can relate to you. I feel like i'm the only one who doesn't like Clary. She just annoys me for some reason. Which is bad depending on the fact that she's the main character.
In the first book I was Team Simon all the way! I <3 Simon!!!! But now i'm a die-hard Izzy&Simon fan!
i can see why आप wouldn't like him, and you're probably not the only one. i don't really HATE him, but i have this curse where i cannot hate any book character. =] he's not my thing though really. i like sweetness. and Jace is not sweetness.
I haven't read the last two पुस्तकें yet, so I don't know much about him in those two. But I actually liked him, he was a great character. I didn't have a problem with him. But everyone has their own opinions, like with The hunger Games, I didn't like Gail या with Twilight, I really disliked Jacob.