Because it's both funny, but when it gets serious, it gets really serious.
Voice actors fit really well, has a... unique...? art style (okay, it's uniquely plain).
And it gives beautiful quotes, both serious and stupid.
uzyehee wrote:
I actually don't watch Gintama...
I saw the 1st episode it's not fun..no offense..
Yeah, like it was said before, the first few eps are really boring. Start at about 22. 25 was a pretty good ep, i think. Or I could be mixing it up...