Mostly 1:72nd, variety of reasons.
1. Space is not an issue, nearly all are given away, but I find a certain challenge in the smaller scale.
2. They appear more as a model to me, the really large scales seem to overwhelm with shear dominance.
3. So many kits and subject types are available in 72nd. My working life was about travel, I found such a choice of hobby shops in foreign lands, finding obscure kit subjects and bringing them home, meant more small ones could be brought back.
4. Seems to me that considerably more in accessories and decals are available.
5. I'm 75, my vision is more challenged, yes, but multiple sets of glasses and Optivisor strengths take care of that.
At times I will build a 1/48th if requested, but not at all often. Guess I'm in the 1:72nd rut, but happy with it.
Patrick