Lastly, even though the high voice still gets me, I do like Vic's portrayal of Kirk. While I do see some Shatner-like mannerisms, he's made the character his own. Likewise, I love the way Chris Pine has now made Kirk his own character. (I also like the Spock portrayal; it's not stiff, but reserved like Nimoy's original portrayal).
Vic is certainly the most charismatic of the fan film Kirks. He has a commanding bearing on screen, which Brian Gross lacks. However, Vic veers way too much into impersonating Shatner rather than inhabiting the character.
Side tangent: a couple of friends and I recently watched TMP on the big screen at the Castro Theater in San Francisco. One thing we noticed about Shatner's performance is that he really does inhabit scenes. He is great at using body language to convey what's going on with his character. Just watch the Enterprise departure sequence, you'll see Shatner fiddling his fingers on the armrest, showing his character's anxiousness to get into space. Or how despondent his body language is after Decker saves the ship in the wormhole.
It's something I'm noticing more now when I rewatch an episode of TOS.
To bring it back to Vic's performance, he doesn't really inhabit the scenes when he's mimicking Shatner. There are times when I don't feel he's Kirk in the situation so much as someone playing Shatner playing Kirk in a scene.
Like I said, he's still the best Kirk in any fan film because he is still captivating to watch.