Not only his voice but his dialogue. Nothing personal to be sure, because I'm sure people would say that about myself and pretty much anyone else if they watched a vid of me or something. He was good at that whole dark and quiet tickler and that was what I always enjoyed about it.
As for his works, yes, they're still some of the best out there, even if they lack enough focus/try too hard to please everyone. Though I think that is more a problem with the current tickling media format (five min vids as opposed to his original hourish long works).
Yes, I regret that he no longer makes videos but I also think that plenty of new producers have stepped up to fill the empty spot he left behind. A LOT of producers.