When I was a kid, I loved slime. What I didn't love was how sticky it was, because I've always had pets and their hairs tended to stick really easily to the slime, meaning I didn't get much play out of it before it would be time to throw it away.
As an adult, I'm not really bothered about it. I'd rather not have to sieve pieces of a toy through it, I'd much prefer to have it in a packet on its own.