Gonna give my thoughts on Ben 10 here, because that's apparently what everyone else is doing.
I love all individual series's. UA is my all time favorite, though, because of what they did with Kevin and Aggregor, a lot of the episodes were really, really dark, and a lot of them were actually pretty funny. I remember an early episode where Ben used Echo Echo to split himself up into three different Bens to do a lot of stuff,but you ended up with a jackass Ben, normal Ben and gay Ben. That was a good one.
I've only watched about 4 seasons of Omniverse, not out of disinterest, but because my DVR and I were sworn enemies when the show was airing. It didn't want to record my shows, even though there was nothing stopping it. If I ever go back to watch it, I might stop at season 6, because apparently season 7 just really, REALLY hates Ultimate Alien and does convoluted shit just to make a lot of it not canon. But Omniverse has my favorite villain, Malware. He was a really interesting character for me, and I really liked him. The art style wasn't great, but worked for what it was.
Alien Force was good for two seasons, and then they gave Vilgax shitty treatment. But he got better in UA and we got Rath, so all is forgiven. The Highbreed were pretty cool, even though they were basically space nazis.
And everyone loves the Original series.I don't really need to go into this one.
Don't have high hopes for the reboot, but I will give it a chance. Man of Action's working on it, and they haven't given me something I've disliked yet.
Also, this only kinda counts, but the Generator Rex Ben 10 crossover is one of the best things Man of Action's ever worked on, and I'd just like to say that.
