Choosing your weapons

I am getting together with my instructor and picking out a weapon to learn. I sent him a list of the weapons I currently own, that I'd be interested in. Ultimately, I think I'd like to learn the Bo, but mainly because I have two of them and I'm short...It gives me a reach on an opponent. I may not get that as a weapon of choice, but I've told him what I have at my disposal.
I also have a pair of (cheap) kamas, a pair of wooden tonfas and a pair of wooden kamas. I don't own a pair of sai (YET!), but that's also something that would be interesting to learn. Then there's the idea that a cane is also a weapon, along with the fan and other things....

As I was doing research, I found an interesting article by Scott Shaw about the Korean Long Staff. I'm interested in it and have a strong leaning toward either the bo or Haidong Gumdo (Korean sword). I should see if my brother would be interested in talking to MG about HG.

Weapons

Today I got an email advising me that I need to get together with my instructors and decide on a weapon for weapons training. This will be cool! I'm excited about that. I have a Bo already, but learning more is going to be a great opportunity. I don't know if I want to continue with the bo or if I want to try my hand with kamas or with sais. I have a cheap pair of kamas, plus I 'inherited' some kamas from a girl I used to train with at the old dojang, which are wooden. I'm not sure I want to learn those or try something new.

That makes me wonder...just how many different weapons ARE there in martial arts???