You sound a lot like I was when I got into PWCs. Got a pair of Kawi 900s from a neighbor and thought they were pretty fun. Within 2 months I was looking into standups. The sit downs were good, but only give so many options for what you can do on them. After I got my Superjet, that’s all I ever rode by myself. The sit downs were good for taking the kids out, pulling tubes, cruising around for 3-4 hours with some neighbors, or loading with gear and kids to find a beach somewhere and chill. Even then, it was more fun standinging on my sit down if that tells you anything.
I 100% agree, standup:runabout = dirt bike:ATV. Both can be run on race courses just fine, but standups are much more challenging. On a couch (sit down) you will be paying more for parts for something you won’t enjoy as much. On a standup, you can run buoys, garb some boat wakes, tear it up in the surf, do plenty of tricks, and still enjoy a nice cruise. Couches are good for gear, passengers, and range. I have yet to ride in the surf, but I hear it’s quite the experience on a standup. You will have no desire for a couch ever after surf riding.
That is one scenario though where you don’t want to ride alone, as it carries a higher risk or injury or needing a tow. Probably best to have a buddy if cruising a ways down a river or somewhere else secluded. I ride solo plenty on the lake here, whether it’s a busy weekend or a quiet Wednesday in October, but it’s even better with buddies. Standups seem to have a magnetic property and you’ll be riding with new buddies before long.
You mentioned transport and standups definitely win here to. You can use a smaller trailer, buy or cheaply build a hitch hauler, use a truck bed, or even the back of an SUV or minivan. One buddy even put one in the backseat of a small airplane. You can get a beach cart to help launch on the beach or difficult access points.
If you want to just haul ass real fast, get a couch. Otherwise from what you’ve said, you’ll definitely be happier with a standup.