the loose cut, I find, is easier to deal with. It has slightly less flavour, but barely noticeable.
Sometimes i find flake to be a pain to deal with sometimes. Especially if youre in your car, you have to find something to rub it out on, uness you fold and stuff, but thats never worked for me.
I've had both, and while i find the flake better, the loose is more convenient for me.