As an owner all I want to find is that you have taken all your belongings, otherwise it means I have to post back to you, take to charity shop or bin it.
Please please don't put rubbish in any bin that it doesn't belong in, it makes more unpleasant work to have to sort the bins out because it's not fair on the next guests to have no bin space.
I would much rather do the job myself ie emptying the fridge.
I have bin coloured coordinated tubs for recycling, stickers on top of the bin lids, inside the bin lids, notices from the council of what to put in each bin, it's written in the information pack and still people get it wrong.
Just because you can put different stuff in your particular coloured bin doesn't mean that's the case here.
I would like to find all towels used in the bath. I don't mind if you don't strip the beds, that gives the chance to check for stains, pulls, holes etc.
I don't even mind if you leave your breakfast pots in the sink/dishwasher as everything will be going through the dishwasher anyway.
I empty one cupboard at a time all contents goes in the d/w the cupboard then gets cleaned.
I have found wet dirty plates put back in the middle of the pile, so nothing is left unwashed.
Soaking and scrubbing the oven is a pain especially if spills could have been wiped up earlier without it being baked on.
I'm sure there are other things but off the top of my head they are the biggest bug bears.