Shows like Saved By The Bell, Sister Sister, Hang Time, Sabrina the Teenage Witch - all kids shows today look rubbish to me, maybe because I'm old.
Playing Mario and Donkey Kong on the SNES - modern gaming just isn't the same.
90's dance music
Rollerblading
Can't think of much else really. Sometimes I miss certain things about being a kid, but there's plenty I also don't miss.