Hi Dani,
It depends what your goals are - are you wanting snacks to benefit your bg levels? Or snacks that taste good? Snacks that are good for you and stop you craving the more sugary ones? (can you see some of the thought processes I go through when deciding what to eat?) Sometimes I just want a big piece of cake because it tastes nice.
Personally, I snack on pretty much anything - fruit, cake, biscuits, crisps, nuts.
Do you inject or pump insulin? ... that will make a difference to snack preferences too. I remember being told to have a couple of biscuits mid-morning to prevent myself going hypo between meals. But now I'm on a pump I bolus for absolutely everything I eat that contains carbs.
Sam