What about James Cawley's Kirk? (Hey, don't put down the phaser's guys! Actually, I like his performance, especially in WEAT; he's improving.)
In all seriousness, it's hard to pick which era of Kirk I really liked. I voted for the first season, early Kirk because he was at his most Hornblower in those days. The burden of command seemed to weigh heavily on him. To those who make fun of Shatner's acting style, I point to episodes such as "The Enemy Within," "Conscience of a King," and "City on the Edge of Forever." Perhaps, Shatner's theatrical training made him too broad of an actor for television, but the role of Kirk was already larger than life and that's the way he approached it. Besides, it was the perfect counter to Nimoy's emotionally restrained, feelings brewing under the surface, portrayal of Spock.
I am also fond of the Kirk that had to face himself and the passage of time in TWOK.
"You showed me my son and I'd be happy to help. My son. My life that could've been, but wasn't."
"How do you feel?"
"Old. Worn out."
(Good Stuff.)