Yup, not only do I play more on it than on desktop (almost exclusively now), but I find myself fully enjoying/finishing games that were otherwise left rotting in my backlog.I've had a Deck since April and the luster definitely does not wear off. If anything, you will find yourself playing it more and feeling less of an urge to play on desktop or console.
Do not underestimate how comfortable it is to hold in your hands. The controls feel amazingly good and can last long play sessions. It's just bliss.