I used to make the mayo/celery version of Tuna Salad, nowadays I use Trader Joe's Tzatziki which adds some tang and crunch.

When I was a kid I used to have to have my tuna salad run through the cuisinart until it was a paste.

My favorite lunch tuna salad which I used to have all the time was on a salt bagal at Izzy's on California Ave. in Palo Alto. Would go there all the time and alternate between their egg salad and their tuna salad.