I'll admit, I like boat rides, I blame it on memories of the jungle cruise from my youth. So I offer interesting boat rides w/ resorts thrown in, in no particular order:
The boat ride along the river to/from DTD and POFQ/POR. Just grab the DTD bus from your resort then hop on the POFQ/POR boat and ride to POFQ, get off, grab some beignets, hop back on to ride to POR, get off and wander a bit, then ride the boat back to DTD. It's a nice relaxing ride along the river.
SSR and OKW are also close to DTD, as well, but I'm not familiar w/ getting to/from them and what there is to see or do there.
I really like the boat rides from the front of MK to FW/WL - it's a nice long ride. Bonus points if you're on the boat and get to stop while the electric water parade goes chugging past. The rides to GF/Poly are shorter - but very pretty - especially at night w/ everything lit up.
The Epcot resort boat ride - take the bus to DHS, walk down to the boat ramp and ride the boat to each of the resorts - Swolphin/BWI/BC YC, getting off then back on @ each stop. Not as scenic, IMO, as the others - but great for packing a lot of resorts into a fairly short ride. Then enter the back of Epcot and stroll through. Or go out front of any of the resorts and grab a bus to any park to transition back to your resort.