I can tell you from experience, you can't pick a saint by his/her name! it's NOT merely about the name, it's about the saint. as a wise nun told me, your saint chooses you.
I thought I'd go with Alexander, after St. Alexander Nevsky, but mostly because hey, "Alexander" is a cool name. I finally chose (or was chosen by
) St. Tikhon of Moscow. I didn't like the name Tikhon at first, but after studying his life, he's definatly someone I want to immitate, and who I'd be honored if he'd pray for me, and look in on me once in a while!
picking a saint's name can be fun, but you'll regret it if you pick him/her just for their name.