Oh, of course its a responsibility....any living creature in your care is a responsibility. Just like if you rescue dogs and cats, or you're in some sort of sport with them....its all a responsibility, but in a way its also a hobby because its something that you enjoy and devote part/all of your life to. Doesn't mean all aspects of it are pleasant, but its still a hobby. xD
Another good example is horseback riding. Whether you go out once or twice a week for lessons or have your own horse and compete, its still a hobby.
And trust me, cleaning out stalls and pins and paddocks makes litter boxes seem like a picnic....
Personally I'm a very strange person. I wouldn't necessarily say that I LIKE cleaning up animal poop, but for the most part it really doesn't bother me. Horse, dog, cat, fish, reptile, rodent....I've done them all and, in a way, I sort of like doing all the cleaning partly because of how nice it looks after I'm done and partly because its part of the animals care, and I like caring for things. I figure its the motherly instinct that comes with being a woman.
Hmm....sounds like you may have woken him up, yes. xD I'm afraid I can't offer too much advice based on experience there....my boys are weird. They stay up late with me and are always awake and begging for food the second I get up. xP I've only ever caught one of my bettas sleeping once or twice before.