I have been on CPAP therapy for about 4-6 weeks now. I think I have finally dealt with mask and mouth breathing issues, and am starting to sleep right through the night

Prior to receiving my machine, I would stay up as late as I could so I could fall asleep easier, and upon waking, I would try to keep myself busy so that I wouldn't fall asleep at inappropriate times. I used to hate the thought of going to sleep because it was never satisfying or effective.

Now that I am getting a good night's sleep, I find that in the morning, I am not as motivated to get out of bed. I feel as if I could easily lay in bed till noon.
I don't, but I also don't feel the need to push myself as I did before.

Is it possible to get addicted to good sleeping experience after so long with only bad ones?
Has anyone else experienced this?

I have the same thoughts.  I have had my CPAP for 13 months now and I average 8 1/2 hours per night.  As soon as I put my mask on, I am out like a light.  I have trouble sleeping past the 9 hour mark but I thoroughly enjoy sleeping.  Besides making and drinking beer, it is my most favorite thing to do.