I usually fondle knives that have more than one method to deploy the blade, whether it be two actual openers or multiple learned techniques. I find just a simple flipper can't entertain me for long at all...........lately, my two favourites have been a de-assiated mini barrage and a boker kwaiken non flipper. The mini barrage has some major fun factor with a thumb flick, second finger flick, or some wrist action with the axis lock. The boker kwaiken is a new found challenge for me, I have been hard at work mastering plucking that thumb disk out of a really strong detent, and then exposing the perfect amount of blade out the back to deploy it as a flipper(try it you'll be hooked!!) Along with the fun of this long unpractical deployment, my brain is also entertained trying to understand how a $100 knife can keep my attention and blades 10x the price never leave the case!