I'm actually very good with regards to most 'junk' food.
I dislike the taste of fast food such as KFC, McDonalds, Burger King etc etc. Don't crave or eat chocolate, crisps, sweets, fizzy drinks etc etc (I drink water, no sugar fruit juice, coffee and alcohol).
I only ever eat take-away pizza if I'm drunk (and even drunk I still wont eat kebabs!

)
My biggest weaknesses are take-away chinese and take-away curry. Even then the only reason I need to diet (which I really do), is because I'm a lazy b*gger who eats to much and doesn't exercise enough.
I don't snack and have 3 balanced meals a day...I just don't listen to the 'I'm full' message when my stomach tells me.
So I suppose if I was to describe a craving then it'd be for big meals of savoury food
Good luck! And keep it up. Me and my OH are starting a diet in the coming months (when we get back from Uni), I've been wanting to loose weight for ages but he wasn't bothered so it made it hard for me too cause when he said 'Oh do you want to stay in and I'll buy us chinese' when I had previously been planning to go out to exercise and have a light meal such as grilled chicken salad...well....I gave in. lol.