I've become a Stainless only kind of kid, lately... I still have some aluminum around and will randomly do a bracelet, and it makes me nuts. I don't like that it doesn't have any heft to it.
I find this slightly funny, as i am making winter gifts for people and I'm sure the most common response will be 'this is so heavy!'.
I love anodized niobium. The colors are glorious -- Have you seen B3's iridescent blueberry? Swoon. -- and it has a nice weight. Sadly, I'm not independently wealthy, so I can't use it exclusively. I also do a lot of AA and BA, although any metal's up for grabs.
For me its BA and AA. It is light, easy to work with en very affordable. I also like steel, but I don't have the right pliers at the moment. Love the look of titanium and niobium, but I can't afford it at the moment. Some day I will try ;-)