People are always asking me about if I'm funny or not... why.. is everybody funny... well I am a class cloun... should I stop being one.. you tell me.

Having humor in your life is a good thing as long as you don't use it for bad reasons, like playing dangerous pranks and stuff like that :)

I love people with a great sense of humor.
As long as the jokes and laughter aren't based on someone else's expense, it's OK in my book.

If you're good with humor then yeah. Don't overdo it though and think people expect you to do stupid things in the class. Some dumb things give a chuckle but, Draw the line from funny and plain stupid.