A little too hard to ID a "white floating Cigar stub". Pretty much any puffer can have washed out coloration at times, but if there are no visable markings I would start looking at Marine puffers first.
I like to think that I've connected with my puffers, they all respond a little differently (I like to think happier) when they hear my voice or see me near the tanks, as opposed to others in the house.
All my puffers have different personalities, some would be more than happy to have a tank to themselves, while others seem to prefer the company of other puffers.
I breed pond snails, which are usually found on plants in the lfs, for food for my puffers and they seem to love them....just be cautious of the Malaysian Trumpet snails (they are shaped like an icecream cone) as their shells are too hard for some of the smaller puffers and may cause chipped teeth.
Kept in good water conditions I find my puffers to be quite hardy, but they are extremely sensetive to chemicals found in poor quality water, so pristine tanks are a must. One of the nice things about puffers (at least the ones I keep) is if you are observant you can tell if there is any potential trouble with your water by their coloration, they start to get darker and dingier when the water quality starts to slip.
The best place to purchase a healthy puffer is from a private breeder that loves puffers (if you can find one) otherwise find out all the info you can and quiz the staff at the LFS to see if they have any puffer knowledge. Unfortunately many folks have to nurse puffers back to health after bringing them home due to a general lack of knowledge at the lfs about puffer keeping.