While I could also say that it allows me to suffer less in that I only do half the writing, it's really only a side-bonus.
Just for the sake of it, I'm gonna go through the process of how I find someone I want to interview and the do's and don't's, because I can't tell you how many times I've messed up.
STEP 1: FIND SOMEONE
If you want to do an interview, it goes without saying that you're gonna need a person to, y'know, interview.
In terms of selecting a person, I try to switch between people of different works; for example, I try to avoid doing several musicians in a row. It's for the sake of keeping things fresh.
In addition, I want to find people who haven't been interviewed before. There are naturally going to be exceptions, and that's fine, but getting to work with someone who hasn't been through the process before is enjoyable in that you know that they will put effort into it; they won't act like a "cool cat" and copy-and-paste answers, and realistically, they're always gonna be humble.
Also important: this isn't a game of Pokemon. Don't try to get people just for the sake of them being "popular"; I've done it before and it's been disastrous. Find somebody that you admire that is approachable and don't think, "Pfft, JonTron would respond" because why the eff would you do that?