NO. no customization of stamp or seal. some stamps or seals are owned by the state and you are "allowed" to use it when licensed.

Have you, by chance, even read your state licensing board regulations?  You should probably do that before you even consider possessing a stamp. 

Just to clarify, in CA you are allowed to change some limited things like line types and thicknesses.

In CO you can make some changes... like any written program or building code, there are set parameters like size and what it must say and have on it.  But you can do things like line widths, add some 'decoration' (like I added some stars between the two circles & my previous one had a stipple effect), fonts, etc.  You'll also want to work with the stamp maker because they'll have recommendations about the sizes of stuff so the ink holds to it ok, or self-inking, or other type options the stamp maker can do for you.  

Back in the day, we'd just go to our printshop and it was a service they provided (they sent the design somewhere).  I'd imagine now you can do it through the internet.

doit

or mount to the bottom

put a bird on it.

There are lots of online sources - I get mine from http://www.engineerseals.com/

First you want to check the paperwork that your state sends when you get your license.  There are at least two states that require that you buy your seals and stamps directly from the state, rather than from any private company.

It's true that there are a few states that let you customize your stamp design - but I have a few caveats:  First, in some of those states you're really very limited in what you can do - basically you still have to include a circle of exactly the prescribed diameter, and the exact wording and organization of content - so your choices are limited pretty much to what font to choose.  Second, in the few states that allow a little more creativity, you'll tend to make AHJs suspicious when you use a non-standard stamp. Of course they can and will verify with the state that you're legitimate - but this just isn't a place where creativity is going to help you.

Mine is just the basic Illinois one. That's all I need - especially since the only thing I've stamped with it so far is my books.

Go big or go home.

NO.

butt plug.

I had my CA stamp done online- designed in ACAD and pushed through photoshop to create the file type at the resolution they wanted, all set up on their web site. I vaguely recall it being a raster image rather than a PDF. It cost about 25 bucks, works like a charm. I rarely use it as I find most deliverables are 'stamped' in the CAD file, with a PNG of the my signature digitally applied.

CA does allow some variation from the conventional format, but requires a limited size range and some standard information. When I renew, I plan to include a bear and a silhouette of the Santa Ana mountains in the seal...

I just finished the ARE and am looking not into a custom stamp per se, but a better designed and crafted handle than what I've typically seen. I haven't come across much, but these handles from Wms&Co. look nice.

I'm curious what percent of licenced architects even get stamps. At this point I have no need, as I won't in the near future stamp anything at my current firm. Even if I were to do side work or switch firms, most of the projects I've worked on don't require physical stamping, we just add it on the computer....