My biggest disappointment is in myself. Years ago I had a hybrid (gasp) common creamsicle midevil that I gave up to a LFS as I had convinced myself that with limited tank space I should have a "pure" citrenellus, and not some mutt of mixed blood. He was an awesome fish, with as far as fish goes great personality. He wouldn't tolerate anything living with him in his 125, nothing, and would attempt to draw blood (sometimes successfully) whenever my hand/arm entered his domain. Yet at the same time he would take large pellets from my fingers one at a time, like a puppy, and not so much as a nip to my finger tips when I was feeding him. Years later I did get myself a pure cit, but I still think about that mutt all of the time.