On my work PC I change rarely.  My button config is unique and I need the buttons to be where they are and not move.  I rely on muscle memory to work faster.

On my "play" PC I change monthly or so to a main theme but I usually am testing skins for this or that person daily and change pretty often.  It's usually through testing that I find a more permanent theme.

I'm saddened to say that my wife has been using Vista Plus (an awesome skin) since it was released.

That all depends, when's Danilloc making a new one?

Honestly, it really does vary on what I see being released. If I don't see anything that makes my want to change my current, I don't. So I could end up with the same skin for a long time.

Realistically once every 4 - 5 days but I clicked once a week since I'm trying to cut down to that. Actually thinking about setting up a Virtual Desktop or second user account with a set theme so that my habit of changing the theme so often doesn't interfere with work programs.

On average, twice a day.AM/PM .I like a dark desktop at night.I have too many choices to narrow it down two favorites. This is my "hobby" so I play around a lot.About the time I settle on one ,somebody makes something that I just have to try out. It's WC's (and you skinners')fault! And I thank you all!!!

I've got tons of skins (with docks to match)...but I change my desktop depending on the set of docks I'm working on...after that its back to Ecliz...I just love the transparency of that skin.

I'm with WG, I change alot, but I come back to my favorite...Black.

At the moment seems I have 160 WB on the computer, so tend to change it around often just because I can. Nearly always DL a new one to have a look at but then will go back to one of a few that I find easy to use, in so much as colours and text work in the programs I use the most.

Since I started making wb skins I change every time I'm starting a new one. I do my own testing so it could be several months in between skins. I still check out skins from others all the time to get and see what's new. I have a fairly decent amount of skins that I have saved.   

Do you know what might be fun - a skin randomizer that automatically switches skins on boot-up.

I wouldn't mind a Dreams randomizer too.

You can do that with the WB config. Just select the 'Random skin' on the list, and select the skins you want to switch between - or all skins installed. A random skin will then be set whenever you boot/login.

I don't change skin on a regular basis. Only when I see one that I like.
But just for the sake being I picked 'once a month'.
I've been stuck with JJs Edisso WB and Stardocks Leo for ages, but I changed to LightStars Vendetta skin the other day just as soon as I saw it in the moderation queue.

Fun fact:
If I applied all the WB's in my collection, starting from the top, changing to a new one every day, I wouldn't see the same skin for 22 years

Damn!

i change everytime i make a new wb.....  

I checked off 'Once a month' only because thats what I 'would' do on a regular bases... but much like other skinners who have replied so far, whatever skin I'm working on holds major priority over all others till its complete.

btw, I rarely use my old skins as I get tired of looking at them for so long during the creation. I have found I'll go back to a few of them though from time to time after a few months or so. Plus I like what others do as well and want to get a feel for this and that.. there be some good skinners around

I actually change when a new skin is interesting to me or I like the color combinations. Right now I am in my purple stage. I change when I get bored with the skin.