I have had my K3 for just over a year; I am very happy and not looking at other things currently, too busy enjoying taking photographs
I say not looking at other things ... what I mean is other camera bodies. Lenses .. oh boy have been looking at those. Currently there are other high cost projects in the house and a new lens will not get authorised by the financial director :-/
I don't get stressed out about not having a FF but if Pentax do bring out a FF I would be telling a fib if I were to say I wasn't interested; of course it would get my attention even if I can't afford it.
BTW I had .. still have a Sony Alpha A580 which I used for a number of years but it doesn't get out much these days unless my niece is around.