Clipped head nails... Sorry forgot to mention that.
More of a chance for misfires, IMHO. But nails are cheap, don't buy a gun because of the nails you have. That's like buying a car because of the brand of tires it has.
I have: Sencos, lots of them, and they've been flawless. They do require parts now and then, like in 10 years. No Senco framer though.
Bostitch, dual nailer type with 2 heads and 2 modes of operation. Great gun but I probably wouldn't get another one. Shoots full head, full length nails and metal attachment nails.
A china knock off from the 90's called Stantech. It's a clone and takes the same parts as a Stanley. Cheap and fairly reliable. It's light and does 8, 10 and 16 ga clipped nails. I grab this one the most unless I have to use full head nails.
Most guns will double tap if you have them set up to fire sequentially if you don't have the touch. You need to bounce the gun, not press it.