fresh tuna in the form of sushi/sashimi or a nice seared tuna steak is gentleman's fare.
canned tuna is a bastardized version for the masses, albeit convenient. I used to eat several cans a day, usually dry... and then eventually with some mustard to make it somewhat palatable. cracks me up when I think back to the garbage I would choke down all in the quest for mass (like adding something extra would have made it less hardcore and hurt my gains).
if you can at least enjoy the food a little, it makes it a lot more tolerable to maintain the high protein lifestyle.