If you're an egghead and you want to get in the "####", arty sounds good. You have to be intelligent to get it, and it's definitely fun. Plus, Marine artillery has been given the secondary mission of Civil Military Operations, a major component of counterinsurgency. There's a huge range of different things you could do as an arty officer. That was one of the big things that drew me to the MOS. All you have to do is suffer through Fort Sill. But this is coming from an artillery officer, so it may be biased.