Ok, first... I'm deeply in love with my Master. I couldn't live without him. He's been my heart and best friend for many years. There is nothing wrong with loving your Master to the point that you want to have the 'hanging out' time. My Master and I spend most of our time together just hanging out. Snuggling, watching TV, reading, talking... anything we feel like doing.

Play time is play time. I think if it becomes too much of the focus of a relationship then it starts to lose it's appeal. Yes, your tastes very well could have changed. But, more than likely you are simply becoming bored and need to take the focus off of play for a while. Talk to your Master, and spend some time together just cultivating your relationship.

BDSM, D/s, M/s, I don't care how you want to say it... it's all about the relationship first.