Questions about aggressive behaviour? Need Help!

[Roadracer]

I have a 6 month old male panther and he is really aggressive, I've had him since he was about 3 months old and I've never been able to hold him other than when I first put him in his cage.

Anytime I stick my hand anywhere near him he either runs away as fast as he can or gapes at me and will try to bite if I get too close. This has made cleaning his cage difficult to say the least, even putting in food is a challenge. I'm worried what this will be like when he gets to be full grown. Even when I open the door to the room I keep him in he usually scurries off and hides.

The living conditions he has are excellent, wish I lived so well, so it can't be anything to do with husbandry. He's in excellent health, eats well and is very active....maybe he's just a mean little *******. I'm wondering if anyone has come across this problem and found a way to make a cham more tolerant of people, is it possible to train a cham?

If anyone has any suggestions or info they could give me I would really appreciate it.