My BP's both are fantastic eaters. Both also stay in feed mode for 1-2 days after a meal. I keep my snake hook handy and get them to relax if I want to get them out on the second day. Its actually been almost 3 days since I fed Aspen and he's still locked and ready when I open the top. Once he realizes I don't have food though he backs down. Rei because she's bigger I always make sure to snap out the feed-mode before I get her out or even put my hands near her. Lol.
I too was conditioned about BP's being picky from day 1, but both of mine have done fabulous for me. Aspen switched to F/T without a hitch, he's going to be on rats soon. I have leftover weans I got from an Expo last year, he can eat some of those.
Definitely wouldn't say a very noticeable appetite/feed mode is a bad thing.