Lol, if you remembered all your past lives and the suffering inherent in the life of a human being, you wouldn't be so excited about being human
That's what Buddha said, anyway. The only way to transcend human rebirth, is to become enlightened. And after experiencing the bliss of nirvana / samadhi / God-consciousness, nobody would really want to stay in this bag of blood and bones
It gets to be such a drag. And even the mind itself gets to be so tiresome.
Human consciousness is just one infinitesimal possibility out of the infinite potentiality of Source/God/Reality. And due to the nature of the ego itself, it's like being stuck in a hamster wheel that keeps you tied to human physicality. Identification with form, mind, and humanness will keep you perpetually stuck in reincarnating as a human, until you choose to transcend it.
I used to think life wasn't so bad, but that was coming from a limited understanding of the true glory of God/Reality. There are better and more exciting things up ahead, so don't feel so attached to this physical realm