Is Family Guy basically just an animated Whose Line Is It Anyway?

[I spent the winter writing songs about getting better]

Yes which is why I find most of the criticisms of it rather stupid. No one ever attacks WLIIA for not having a plot for example.

Actually come to think of it, Seth MacFarlane would make an awesome participant on WLIIA as well.

[I spent the winter writing songs about getting better]

Aside from being about animated families, there isn't really a whole lot of similarities between Family Guy and The Simpsons. And The Simpsons is a terrible show* while Family Guy is brilliant.

*It had about nine good seasons, and a lot more utterly horrible ones, so on balance it's a terrible show. Had it been cancelled at the end of the Bill Clinton presidency, it'd be one of the best shows of all time of course.

[I spent the winter writing songs about getting better]

Family Guy is basically an animated version of Date Movie, Epic Movie, Meet the Spartans, etc.

Uh, no. Haven't you seen Ted? That's basically live action Family Guy and the same style of jokes. And it was funny. Family Guy has actual jokes, not just references.