Mine is extremely interactive with me but also very lazy otherwise. When it sees me it comes out of its cave and begs for food. It will swim around when I am in the room and is very inquisitive watching what I do. If I am in the room for a while and it senses it is not getting fed it will go back to just sitting.This is a really pleasant surprise
When i clicked on the thread and saw the first post was back in 2014, i thought, someone just revived an old thread, but after reading this last post i am very happy i went through the thread and the puffer still being there with you.
I have been keeping one for almost an year now, and i want to ask a few questions as you have good experience with this one.
Mine when new was a very very active specimen constantly running around the front pane the moment i was in the fish room, now just hides under a piece of driftwood, eats once or twice in a week, although would eat crabs eveytime if I put.
I also keep an arrowhead puffer that I feel is pretty interactive too. I feel the key is a good sized tank and a lot of interesting decor. Each of my lurkers have a 65B to themselves. I know they say the fish only need like a 20-30 gallon but I feel the extra space makes them more comfortable and in turn more outgoing. Cant prove this theory but I do keep two lurkers and both are super interactive with me. The decor comes into play for them to interact. The hairy loves its cave but there is another piece that it sits on like a perch and watches over the tank. Must be interesting enough for the puffer because it never cruises the glass like others do.
Hope this helps. As a person who also keeps other lazy fish like bichirs, my puffers are way more interactive.