My dad was a massive N gauge fan, and that was what I was weaned on.
I enjoyed fitting a small layout in a small area with some scenery to boot.
However I reentered the hobby with OO, I dabbled with N again in 2000 and 2007 but I've come to the conclusion that the availability is not as great as OO and I want very specific things that I may be able to alter in OO but would be too fiddly for me in N.
For instance I have a Hornby 31 patiently waiting to become a 31/4 from a /1. I'm quite happy to paint a white stripe on it and add some ETH detailing bits in OO because they are just big enough for me to do it, I certainly couldn't in N.