Well, its a big gun and just rolls off the tongue rather well in my opinion. Or it could be that I'm just compensating for something that may be lacking...
I've used many handles whilst playing LAN games, but they all seem to be a bit ... well ... dirty (Donkeypunch, ChiliDog, Cleveland Steamer, TheHitler... you get the idea). So I decided to clean up my act, fly straight and pick something that doesn't offend so much.
I will have to say though, when the time came for a change, it took me a day or two to think of "Howitzer", but it always amazes me how many people mispell it when they are chatting with me (Most comonly: Howiser).
Just remember, you asked