I hooked up on a good size striper one night when using an 8wt.
Scared the bejezzies out of me.
Never brought an 8 again.

When I was a kid I would use an old glass 6wt to catch snapper blues. That was fun.
But I never went that low when expecting to catch real fish.

I fish my 10wt most of the time when I fish from shore. Much better in the wind than a 9wt. In the kayak, I like the lighter weight 9.