I'd like to speak about this subject from an objective point of view.
It's true that all you can see now are most of the time sonic, mario, dragonball z, pokemon cartoons. A lot of game parody cartoons and more. I'm getting pretty tired with them as well. However it's really tough to come up with original material. Let alone make it appealing. Plenty of content is original, however most of the time these are poorly thought out. The most important thing is appeal. A lot of original content lacks this and the audience won't care or lose interest to never return again. Of course already popular established brands are easier to use. You can make parodies, but please make them with the heart. Express your love for the cartoons/games that brought you joy or have nostalgic value. Not for the sake of milking it, to boost numbers. Another thing is your audience demands regular content, coming up with original stuff takes a lot more time. Then you have to animate it also which is months of work.
As for the animation all I can say is try to perfect your pose to pose and from time to time throw in some straight ahead animation. Makes your poses vibrant and interesting. Add some detail, the bare walls were to noticeable. Also try some dramatic angles. Exaggerated poses and dramatic angles are key in animation.
The voice actor for the frog seemed to withhold whenever he had to raise his voice. It's something i see too often, it really is a bad thing to do. My tip is, do the voices when nobody is around the house if you're that worried. As for the neighbours, who cares. For all they know you could be watching a video with the volume turned on really high. If your character has his/her own distinctive voice, they won't know it's you voicing them anyway.
Good luck.