I have been doing ti a long time. I actually started with short animations on film, all lost now sadly. I am not a good cartoonist but manipulating objects as characters is fairly easy to me so 3D seemed a good fit when it became possible to do at home, for me that was the late 80s. I am TERRBLE are making characters, getting better at rigging them but has little trouble animating them. So if I had someone to make them I'd do a lot more work. One thing I find really helpful is to watch old cartoons from the 30s mostly.. they have the best, fullest movement and timing. I also just watch people all the time and sort of file away in my head the gestures they make while talking, yelling, laughing thinking Ill use them later in a project. I am pretty familiar with the cat robot I animate for a TV and now I don't even have to think about counting frames to get the timing right, t's very natural to me. New characters take a wile to work out and I try and practice all the time with some characters I've made just to play around with. My first lovecraft film took 5 years to do, out;y becuase I couldn't get the characters to look even close to right.
Hope that isn't too rambling a response!