what do i respond with when i think something is funny, but i don't wanna type "hahaha" cause it might not have been funny enough to warrant that many ha's, but i also don't wanna type "hahah" cause that's basically the same thing as "haha" which is not ENOUGH ha's???
i think either haha or hahaha should be fine. you are going to have to round off to the nearest ha, in this case.