Is headphone listening a primary or backup for you when listening to music?

I’ve got both, and while headphones are nice they cannot put performers and performances viscerally and as big and spatially in the room like a home system can — not even close and not substitutes at all.  I like headphones for what they can do and my home system for what it does, and never the twain shall meet. 

My RAAL SR1a are 2-channel speakers on my head. The closet you will come to 2-channel with headphones. Actually, there is another company in Europe that has a similar concept, but I never heard it.

The RAAL 1995 Immanis is considered one of the very best phones at any price. I love that phone too, but the much lower cost RAAL SR1a is still the champ for me because it gets me so close to 2-channel.

My RAAL SR1a is my second-best system, though my Mini Maggie’s (3rd best) are also high quality and I have them setup like headphones.

Like many, my headphone based system is put to use when my wife is asleep.  I really do enjoy it but loudspeakers offer me a far more realistic presentation of the performance.

I cannot respond with a proportion for headphone use is situational, based on whether other family members are working from home, or otherwise not in the mood to listen to my main system.  I do not have a dedicated listening room.  My living room serves that function, and my home is very average in size if not considered small for the NY tri-state area.  Until recently, I never listened to headphones for critical listening.  However, and with a shout out to @ghdprentice , following his advice in many posts, I purchased a respected, if not midline, dedicated headlamp (Burson Audio Soloist Stellar) of sufficient power to drive my power craving cans properly and have found cans can be magical.  So now, when the situation requires personal listening, I do not mind at all.  

 Secondary to speakers BUT mandatory in my living conditions..
 I will say however,the headphone circuit of my Pathos Classic Remix Mk.II is superb & compliments the 2 pair of cans I own perfectly so I never feel like I'm slumming when listening...