For this list, I'm going to try to avoid nostalgia overrunning my list. I'll still let one classic show on the list though.
1.
Homestar Runner
Why am I putting a web series at the top? Because it's a series that never failed to entertain me. In fact, this website is the reason why I've always wanted to make my own cartoon. While that hasn't happened yet, I haven't given up!
2.
Justice League Unlimited
Sure, some people might prefer Batman: the Animated Series, but I prefered this one. Why? Because it let us see the non-Batman side of DC. I liked how it gave other heroes time to shine while not feeling overcrowded. It's a shame the team behind the DCAU never got to make that The Question series they wanted to make.
3.
Gravity Falls
While I can't say I watched much in the way of Disney when I was younger (as I prefered Cartoon Network), when this show caught my attention, I definitely had to watch more. Just everything works here, from the lovable characters to the writing and so on.
4.
Dan Vs.
One of the lesser known, but still relatively popular, shows from The Hub. Unlike a lot of kids shows that have the main character learn some lesson while trying to overcome the problem of the episode, this one has an angry man getting revenge on something that pushed him over the edge. His revenge schemes are definitely something, ranging from keying a werewolf's card for scratching his to somehow breaking into the control room for America's missiles to blow up some squeals that he found annoying. Yeah, this guy has issues. As a plus, the production company has put all the episodes up on YouTube...
for free!
5.
My Little Pony: Friendship is Magic
Do I find this show entertaining? Yes. Did it hook me from episode 1? Yes. Is it my top show? That's clearly a no, why else would it be at #5? But I digress. While it seems FiM is rather dangerous to bring up outside of Brony groups, it still deserves a place on my list. This show has everything, from likable characters, great writing, great voice acting and amazing guests (like Weird Al as Cheese Sandwich).
There's my top ten! Sorry if I was gushing about anything or repeating myself or being boring here, it's not often I write about why I like something.