For the longest time, the family cat, Blue, has shown NO interest in catnip, in fact, it bored him, he basically ignored it, no matter how many times I put the pot of fresh catnip in front of him…
NOW, however, he can’t get enough
I’m a bad kitty daddy, pushing kittydrugz on my poor, defenceless cat 
You’re such an enabler! You ought to be ashamed!
…Ashamed that you didn’t catch on sooner to your cat’s obviously superior tastes in catnip, that is! You were probably offending his sensibilities with all that inferior stuff. 
Cute kitty, anyhow. 
Y’know, I’ve owned 5 cats in my life, and NONE have displayed even a half of an inkling of an affection for the 'nip. Maybe I should try fresh…
Joe
Usually kittens aren’t interested in it, but when they hit adulthood, it suddenly starts to be attractive. However, there’s quite a large percentage of adult cats who never get into it.
Blue seems to be trying to make up for lost time in that clip.
*He is a cat but he’s very very fat.
He’s not just a standard cat.
He is a cat but he’s still very fat,
American calico cat.
Catnip is a kitty cat drug,
One puff two puffs - high in a dream.
Funny kitty’s got very sleepy eyes,
I wonder what he’s dreaming of.
Catnip dream, catnip dream, catnip dream,
Meow meow meow*
There’s a song for everything; even a drug song, for cats.
If you don’t talk to your cat about catnip, who will?
This [show carton of eggs] is your cat.
This [fling eggs madly around room] is your cat on [grab second carton of eggs, fling them against walls, ceiling, floor, down stairs, out window] catnip.
Any questions?
All our cats like catnip to some extent, but our calico freaks out for it, and I mean freaks out. She wails like a wild eyed dope fiend when I get the box out. When she gets her fix she rolls and flops like she’s being electrocuted, and her eyes roll around in her head like she’s having a seizure. It’s a little disturbing. If the other cats even try to come close to her stash, she’ll go into Bruce Lee whoopass mode on all of them simulatanously.
Heh. My kitties like catnipjuuuuuuust fine.
pravnik, that’s interesting. My calico is also the biggest 'nip fiend. This is her in her 'nip-rubbed scratchy-box. Notice the wild eyes?
Cute! Those are the eyes, all right.