Rocket is purely a ranged character. He doesn't have a melee combo--just a tackle, ground pound, and unblockable grenades. If you upgrade all of his ranged abilities, he has, I think, the fastest shooting rate and it seems like he never has to reload once you get his second clip upgrade. I think most people probably might find ranged characters boring if all you're really doing is shooting nonstop. Characters with a mix of ranged and melee are likely more interesting to most players. Novas ranged shots are pretty weak but his charge shot is extremely powerful. Nova and Ironman are essentially the same but their specials and block breakers are different. Star-Lords range is weak compared to Rockets but you can upgrade his to homing shots but I don't believe he has a charge shot iirc. Star-Lord has some decent melee capabilities unlock Rocket, though.