While I do concur with you about negotiating and interviewing best, I like to save shotgun for last because often the interview process from all of those companies slows me down a lot. Especially the companies that give you projects to do :/

While it stinks to feel like you've done worse going for jobs that you really care about, it helps to remind yourself that all companies have communication/social problems that will impede your work. No company is really all that special.