@ teacake, I don't have an overall negative view of the thread; on the contrary, there's been some great stuff. And I apologize if I've been pushy; I was really trying not to be. Provocative to certain brief remarks and little-justified (imho) remarks, maybe, but that's another matter. So I'm just going to take several steps back here, and see where things go; my only request, if requests are cool (and I did my best to articulate this in the OP also), is that people do contribute some detail/context/justification to their answers...
I don't think my posts have been quips. I've been entirely serious. In terms of the environment, I have a net negative effect that is probably not dissimilar to many of the other people posting here. I don't plan to change either as the biggest offenders (eating meat, having children) are things that I'm currently unwilling to go without. I think that much should have been obvious from the start.
As far as professions go, I'd like to eventually become a clinical psychologist but that seems very far removed from the content of your original post.
Edit:
I also want to add that I find your tone off-putting and it keeps me from wanting to engage in any sort of lengthy discussion. You characterize what I've posted along the lines of "being polite to the checkout boy" while you speak in more grandiose terms of your own plans of spreading peace and goodwill through the Navy. I didn't say that I'm simply polite to people, I said I like to make their lives easier.