As hard as it may be to believe I didn't love him instantly.
I didn't start the series at 101 so I missed a lot of background on all of the characters and storylines. The few mid-season 1 episodes I saw did not endear my heart to Brian. I thought he was an arrogant asshole.
When I picked up at 201 I was left figuring out what the hell happened at the end of season 1. Slowly during season 2 he grew on me but I honestly have no clue when exactly I fell in love with the character.