Smaller vs larger listening rooms?

My sister was just reminding me of a relative we visited 50 yrs ago, with a big old house with huge living room -- it contained a grand piano and six couches scattered around, as well as the stereo. 10 ft ceilings.

I still remembered how sound from the stereo bloomed in that room.

Enjoy your room it is ok.

I currently have a 25x26x7’ dedicated room. I have everything setup a little out of center so I don’t sit in a bass null. It works well enough. 
I had the same system in a 13.5’x18x7’ room in my last house. 
The large room was harder to get the bass right which is the opposite of what I would think. Both rooms were carpeted and both ceilings were acoustic tiles with 8” of mineral wool behind them. 
Sound stage and imaging are much better in the big room as I am not by any walls really. This could really not be achieved in the smaller room. The small room needed a lot of toe in to not have side wall bounce and that would shrink the soundstage and make the speakers brighter. In the large room I point the speakers with much less toe in. 
I should point out that I actively cross over two subs in both rooms so I dial in the bass as needed. 
I still need to buy treatments for the walls but it is coming along.