I've used croc knockoffs extensively in the past. Light weight counts for a lot. But they are very noisy to walk in when wet. And I always cut off the strap.

But I also have often used slides like these from Walmart -- in fact, when I am in North America, that's where I usually buy my next pair when the old ones wear out.

No thing between the toes, Velcro adjustable, wide top, comfortable to walk in whether to/from the shower, through campgrounds, and at the beach. But they are also lightweight, easy to stow, and I like the moulding for the footbed.

Back in Australia, there are quite nice variations appearing now, and I am wearing a comfortable pair right now.

So the slide designs are the best flip flops for me.