Tesla (5 times) (I'm not even a huge fan, but they're like my sister's favorite band, and they usually play close for fairly cheap, so I've just gone along)
Queensryche (4 times)
Seven Witches (4 times)
Edguy (3 times)
Also, it'll be my 3rd time for Maiden in March and my 3rd for Symphony X in April. Also, good chance it'll be 5th for Queensryche in February. Can't wait.
I also feel I should mention that even though I despise them, I've seen Into Eternity 4 times with a 5th on the way. They need to stop opening for bands I like.