Think I'll miss the credential most, that sense that I can call or walk up to just about anybody and start talking to them because I'm "Joe Williams of the Bumfork Bugle..." Anybody, of course, being a relative term -- I wouldn't get within 50 yards of Obama, I understand. But the extra heft that you have because your institution is acknowledged (maybe respected, maybe feared) in your coverage area feels good. Even though you dare not trade on it for real personal gain, it does give some satisfaction.
But I agree with Moddy and Frederick. Most of what I'll miss when I go already beat me out the door -- the level of ambition, the camaraderie, the starch in a good supervisor's shorts when it comes to fending off sources' and readers' complaints, the travel budget, the opportunities to advance and the freedom from worries about layoffs and pay cuts. Gone. I also miss working in a newsroom that truly tried to cover the news without undue political leanings or agendas. And for top bosses who knew how to lead and cared about it, as a way to tap into that little extra-extra in good journalists, rather than just frantically ordering us to "do more with less" because, like children, they know they don't have to pay for that "more."
Leaving newspapers, though, will never stop me from writing in some shape or form. So I'll never miss that. I plan, in fact, to enjoy it more than ever, freed from the running stories and the blogs and other wastes of time that have crowded out substance and something approaching real writing.