Hope the ritalin and welbutrin get you back out of the abyss, at least a bit. The concerta and zoloft don't sound like they were fun. At least now, taking the long route, you know a bit more what works/doesn't work and can block some lies.
What diagnosis would you "like"? I imagine depression can cover a lot of ground in many directions.
My sister-in-law claims my 66 year old brother (was Army major, thrown out for alcoholism at year 19 (thanks to two tours in Vietnam, etc.) so didn't get squat/"retirement") has ADHD. I wonder if he and I might have a touch. All these things have a continuum on them though so hard to tell what's where and who's diagnosing what for whom.
Good luck with your 6 month deploy/marriage problems.
Have you taken any college courses while you've been in? I highly recommend my school,
http://www.umuc.edu It is probably 1/4th-1/3rd military or former military/dependent types taking classes. Might help focus and self-esteem? Just working with others in the classes helped me with my own personal problems in the sense that if one can work logically at a class and figure things out and how stuff works one can do it in other parts of their life.