I've been married for 30 years. I'd say the point you're at is called the "Comfortable" stage. You both know each other's likes and dis-likes to the letter and respect and accept your individual ways and habits.
I'm sure that many people out there that haven't achieved that level of comfort would love to be in your position. I, for one have also reached that level and I can honestly say,,,,, it continuse to get better!!!