My model railway layouts in the past were always OO scale (apart from a brief excursion once into the smaller N gauge) but now i am planning my return to the hobby i am thinking of going with the smaller scale again despite still having my old OO gauge stock, buildings and track in boxes.
The reason is space, as in i don't have a great deal to play with. Atop my desk in the study looks to be the best place for the layout and this would allow a board of about 150x70cm. In that space i could have a basic end-to-end OO layout but it would be pretty limited. If i use N gauge however i could easily get a much more extensive loop layout with a fiddle yard. I've been playing around with a layout planning software tool and think i could just about get a double loop!
This would allow me to have the early 70s BR layout i've always wanted. Class 20s and 25s hauling freight passing a DMU... Well thats the dream and maybe next year it can become a reality.