I've just completed the survey.
I have a variety of differnt luggage, I prefer panniers that I can clip on and off that can be carried easily as a bag off the bike. I have a Linus Sac, Basil Elements bag and Ortlieb back roller plus in grey (mostly used for touring). These are all panniers that I'm very happy to walk around with that I feel dont make me look stupid.
I also have a Giant Liv handbag that has a really funky attatchment that fits to the handlebars. Tis is especially usefull when I'm on my folding bike which doesn't have a rack.
Having said all this, I'm currently using a Basil Blossom double pannier which is permenantly attatched - I consider it to be the "car boot".
I have a wire basket front and sometimes back (on the rack).
I also have permenantly attatched a small seatpost bag with multi tool, inner tube etc.