Interesting conversation... thanks for the feedback. I like hearing how different people feel about different strings. I personally dislike multis, because they feel a bit mushy and board-like at the same time... which is weird. And I've only played with gut once and I absolutely hated it. It felt like a board with zero spin.
To answer a few questions:
He is not a string-breaker, although he eventually notches the mains after quite a few hours of play.
He plays 3-6 hrs per week.
He really doesn't complain too much about the string movement. He just makes comments about it and he asked why mine don't move. I play with full Solinco Tour Bite.
I guess I might try a hybrid just to see what he thinks.