It sounds a little like you're letting the gear get in the way, which is easy to do considering the attractive range of options these days. When I started doing radio, I had a minidisc recorder (hated it) and one mic. That worked pretty well for most stories. The key is to not disconnect with your interview subject. Get in close, try to make a connection and focus on leading the narrative in the right direction. Having a range of mics and gear is nice but that's for later. Forget about the mic stand and moving around during the interview unless that's part of the story. Be a reporter first while keeping in mind that you're also there to get clean, workable audio.
I definitely am over thinking it. But just worked on a piece with mediocre sound and spend a huge amount of time trying to correct it. I figure it's worth thinking about but, you are right, I shouldn't let it get in the way (but there are so many options ;-)