It's been a long time since I saw any SGA, but Zelenka is a fave :D Reason is simple:

• the character is Czech, and
• the actor is Czech, so
• there are some really funny lines in the show (ad-libbed when the script said "Zelenka speaks Czech", I assume). My favorite is (translated) "Jesus, I can't work with these actors!" XD Also, nothing like a character on your US show yelling "DOPRDELE!" really loudly.