If you've tried the Aquila Nylgut and dislike them, fair enough, bit if not, give a set a go ... they're definitely "different" to nylon. I've not used fluorocarbon strings, so I can't compare them.
Yes, my uke came with Aquila Nylgut. I didn't dislike them, but prefer flouro for brighter sound, and intonation seems more "on" when going farther up the neck.