Thank you all so much!
blues took some time to review all of your preferences and suggestions, and noted that one very popular theme is what is characterized as:
a militaristic design. Nothing fancy, a more
realistic serious militaristic design.
Camouflage, tankish, bad ass powerful look
(I was a little iffy about whether it was ok for us to say "bad ass" or "badass" on the forums, but as long as it's not directed at a person, but is used as a description such as the above, it's ok.)
I'm going to go ahead & lock this now since everything's been reviewed.
Thanks again for your input!