I'd say that computer-aided animation and frame-by-frame are the most liked animations nowadays.
Yay. It creates a very unique effect that's pleasurable to watch.
It really depends if its your character or not. If it's not your character then you should make it look like it's that character without having to state it to someone. If it's your character then you should be able to make slight alterations in the design whenever you please.
Color, it adds a lot to an animation. Also, an easier option, still frame backgrounds. It's a struggle for a lot of people but I think that it could be a good choice here!
This depends on how you'd like to have animation in a career path (assuming you do)
big companies like disney heavily rely on computer-aided animation now a days.
Or you could do youtube, it's not a really steady source of income but there's a huge animation community there!
I say yay!