I don't think I hate this world enough (yet) to leave it just like that, I wouldn't want my family to worry about my current location etc.
If I were to be born again as a cartoon horse in Equestria after I die, I guess I'd be down. I don't consider that land a perfect place to live, there are several dangers coming for you all the time, all these monsters and antagonists. I'd give up living in a (supposedly) democratic country and live in an actual kingdom, if I'd get to the right city I'd be able to see characters of an almost godlike status. Instead of physics, I'd learn about magic, could possibly levitate objects and do other things impossible in our reality. On the other hand, Equestria does seem to be lacking in technology (they don't even have cars) [EDIT: Just seen "Testing, Testing, 1, 2, 3" again, they have helicopters, so I'm even more surprised we haven't seen a single car in the show]. Also, I'd have to give up eating meat, which seems like a terrible idea to me (not sure if ponies' diet is that healthy to be honest). I hope I wouldn't have to sing songs all the time like mane six do. Aand if I'd have a friendship problem, I guess the map could possibly summon some of the main characters to fix it for me, soo that's a thing as well.
Overall, not necessarily that bad of a lifetime, some cool places to visit, an interesting way to spend your life (do ponies pay taxes?) I'm wondering if tourism is popular among equines, judging by The Parent Map, it probably is. Answering the question: not as of now, maybe in my possible next incarnation