We got our first kitten this year in October! :D The kids (now 7 and 14) had been asking for one for the past two years: so I made them research it and I spent that time reading up on how best to look after them, learning about the costs etc (I've only ever had reptiles as pets!).
We put our name down for the local rescue places but no replies/responses from them...then a friend's cat had kittens. I can't tell you whether she's easier/harder to look after than other cats/kittens, but we adore her. She's settled in beautifully, and is so much fun.
I work FT, and my kids are school age, so we do lots of playing etc with her whilst we're at home and she has the run of the house whilst we're out. She's fed 3x a day (first thing, and then at supper time, but I leave dry food out for her to graze on) and uses her litter tray with no problem (we scoop it 3x a day). She sleeps on my bed (despite having a lovely cat bed!) and wakes me up in the morning with lots of purring/chirping etc, it's so sweet :)
She's nearly 6m old, so was spayed and micro-chipped last month. I pay out a monthly thing with the vet to cover flea treatment and worming treatment, and I pay out for vet insurance. Food costs aren't too bad, but I've gone for Royal Canin, Lily's Kitchen and another one I can't remember the name of! I'm keeping her in for the moment and only slowly introducing her to the outside (mainly because I'm worried she might bolt and go AWOL). I've not yet had a catflap put in: maybe in spring time when it's a bit warmer and the days are a bit longer.
So yes, there's responsibility, but she's easy to look after, seems to have an on/off switch (goes crazy and zips around like a mad thing, does a massive long playing spree, and then zonks out!) and is really settled/happy.