optimum size of an all rounder

With all that talk about beginners wanting to ride smaller boards got me thinking. How would you decide how big you want your go to longboard to be?
Last year I was going to pick out a mini longboard around 8'6 that's not outrageously wide or thick for my size at 5'2, 105lbs. But since that wasn't a very commonly available size on craigslist around where I live I've settled on a 9' x 22 3/4"(i just found out this dim. which is more than I originally thought) x 2 7/8" which has been more than awesome. Yet compared to my kids' 8' or 8'6 mini longboards mine is less nimble in water i.e.. more work to spin around in the lineup or turn while riding, and the trip to the nose or the tail takes more steps. I don't have much issue getting back out or handing out of the water with a 9 footer so it's not about the convenience.
I definitely like the more flow-y riding style of single fin longboards so I want to keep a dependable all around longboard all the time even though down the road I want to ride a shorter egg or magic carpet like ultra mini longboard to add variety when the condition allows. I'm just not sure if my current board is the right size for me. I suppose I'd be having a sit down with a shaper for my next board but before that I thought it would be good to hear from the experts here
I typically surf a point break that's around thigh to shoulder high but it can have really small days as well as rare OH days.
Last year I was going to pick out a mini longboard around 8'6 that's not outrageously wide or thick for my size at 5'2, 105lbs. But since that wasn't a very commonly available size on craigslist around where I live I've settled on a 9' x 22 3/4"(i just found out this dim. which is more than I originally thought) x 2 7/8" which has been more than awesome. Yet compared to my kids' 8' or 8'6 mini longboards mine is less nimble in water i.e.. more work to spin around in the lineup or turn while riding, and the trip to the nose or the tail takes more steps. I don't have much issue getting back out or handing out of the water with a 9 footer so it's not about the convenience.
I definitely like the more flow-y riding style of single fin longboards so I want to keep a dependable all around longboard all the time even though down the road I want to ride a shorter egg or magic carpet like ultra mini longboard to add variety when the condition allows. I'm just not sure if my current board is the right size for me. I suppose I'd be having a sit down with a shaper for my next board but before that I thought it would be good to hear from the experts here
