Lanzladt,
You can get parsnip crisps in some shops, I've had them from Aldi before, and very nice too with about 1/2 the carbs of normal crisps. Nuts are great, just be careful as some are quite carby.
I love crisps, never had a sweet tooth but a savoury one instead. I don't eat that many now though, but I still do have a bag as a occasional treat, nothing wrong with a treat from time to time. Favourite are XL cheese, or seabrook's pickled onion, cheese and onion or tomato flavour, good crunch and nicely seasoned.
Nigel