Here's my take on him.
At first he comes off as rough, very binary. Either something is awesome or it sucks.
But the more I've watched him lately, I see that he's at least fair about it, especially when comparing WoW with FFXIV. If he thinks something in FF looks cool or is a good idea, he'll say so. He's just really *really* quick to dismiss something immediately out of hand, if it doesn't tickle him right away. He can't get past cat-girls.. just creeps him out.

I'll be interested to see where it goes but, I agree with someone above.. the ARR storyline and pace.. he wants to jump into endgame and raids as soon as he can.. but we all know that won't happen.
On a recent video he asked how long, once reaching max level, he can get BIS for everything and due to the nature of weeklythings, six weeks, he was "ok, I can live with that..".

There are now many video series' on youTube of WoW players (10 or more year vets) coming over to FFXIV, trying it, and having a blast. You never know, he may end up liking it. I hope so.

Fingers crossed.