I just learned about this site a few days ago and wow is it crazy! You can do text to speech with hundreds of different voices from various celebrities,tv shows, youtubers etc..
Now of course most of the voices are far from perfect but many are still a lot of fun to mess around with. I haven't gone too crazy with it yet but I had some fun making Linus from Linus Tech Tips say some interesting things.
Check it out and post your creations here. I'm interested to see what you guys come up with.
PS Reading this back after I typed it I realize it looks like a bot posted this to advertise the site.
But I assure you I the good ole Calacera posted this. Now if you'll excuse me I have to go record some mix tapes by hooking the line out on the sound card of a PC from 1997 into a cassette deck from 1981 using a 3.5mm to RCA cable I bought from Goodwill. 
