That's tough! I like all of them!

Are they hooked up so you can see how much light they put out? I like the blue one best but the glass one will be better for general lighting. I'd pick one of those.

(The bronze one is an awkward shape and an unnatural color--I would not trust the coating on it to last.)

Definitely not the bronze. Completely wrong colour for the kitchen. - Just my automatic reaction.

I like the glass but I am also a sucker for seeded glass. However, I think the hardware matches your kitchen faucet well. I like the copper but it seems to clash with your hood, but I can't really tell