Couple things first. Kurt zisa.. your avatar is Shock Wave from the original series, correct?
Second, do not feed the animals Nix.

I own all the seasons of the original Transformers and it's movie... I remember when I was child in the movie theater and the dad in the movie yelled the word "shit" good times. Also the intro song to the movie is pretty epic.

I watched a couple episodes of beastwars and couldn't get into it.. maybe I'll have to try again later.
I have no clue which other series of Transformers are good. I am an absolute fan of the original though.