Is it normal to like sleeping on the floor?
Mostly.Normal for most people
Yes, it’s normal to prefer sleeping on the floor. Some people find a firm, cool surface more comfortable than a mattress.
People have different ideas of what feels comfortable, and a firm surface or the feeling of being closer to the ground can be appealing. Plenty of people choose the floor now and then—or regularly—because they sleep well there.
Just make sure you’re warm and comfortable, and that the floor is clean and supportive enough for you. If it leaves you with ongoing pain or numbness, try changing your setup; otherwise, liking the floor is just a sleep preference.