A good score is 1-0. 
If you mean rating... well, that depends. If you're new to rated chess, then something like 1400-1500 might be a good target.
For "violent", highly tactical chess games, I'd recommend looking up the games of a past world champion named Mikhail Tal.
Anyone got a good fistfight of a game? Please email me the score so i can watch over it. I like violent game a lot so if you have please send. What is good score on this site? I'm new to net chess so I'm not sure what to expect is nice score.