We have an aquatic turtle, and i'd say he is pretty easy. We're upgrading to a much bigger tank very soon, which he desperately needs, but once you have that initial investment (tank, filter, heater, light, etc)....i just throw some food in every other day, sometimes give him feeder fish and meal worms, change the filter pads occasionally, and of course pay attention to make sure nothing weird is going on. He seems alot less fragile than fish.
He doesnt shed.
He doesnt make any noise.
He swims over to the side of the tank and waves whenever i walk by. Its really cute.
I don't have to clean up poop, the filter takes care of most of it.
He's really really cute!
Our cats are pretty low maintainance....scoop out the poop from the box every other day or so and flush it. I free feed (i kinda have to, as i'm away alot), so i make sure they have food and water. They like attention, but are not too needy. We briefly had a kitten....and i remembered why i did NOT want to get a kitten. LOTS of work. But the older cats are fine. One sheds more than the other (she's medium haired)which i really hate, and brushing doesnt help that much (i can brush her for twenty minutes, then run my hand across her back and get a handful of hair! ugh!). I can give them attention while i do other things, like read or watch tv.
We've had guinea pigs and hamsters in the past, and i've found them both more work than either the cats or the turtle, mostly because it stresses me to have prey and predators in the same home. I couldnt give the little furry guys the kind of freedom i thought they needed to thrive, without worrying they'd get eaten. And because they were caged, in order to interact with them meaningfully, it was a whole process of making time to focus solely on them, make sure the cats were elsewhere, etc. Plus i did not enjoy cleaning out the cages, and my house kinda smelled like a petstore (not in a poop way, but in a pine shavings sorta way.)
I would love to have lots more animals but i'm at my personal limit. My son would like to have a bird, but i don't "do" birds...i know i could never live up to that responsibility. I'd like to have a couple rats, but we're then back to the whole prey/attention/cleaning cages stuff i didnt enjoy. There are so many animals i'd enjoy having (reptiles, a tortoise, snakes, a DOG) but its not going to happen any time soon. I do plan on putting some simple fish in the small tank we have now when i move the turtle to his new one---probably just rosy reds or feeder goldfish or something. I (accidentally) killed a couple of gorgeous fancy goldfish last year (Tip: dont buy fish from walmart on impulse, fill a little tank full of water from the tap and dump them in. I'm such an idiot.) I felt soooo guilty, i dont think i can ever get goldfish again.
The turtle is my favorite. They need alot of space though.