I've only been in "N" scale for about 2 years now, in my previous life, ever since I was about 10 years old, I scratchbuilt Radio Control boats. Got tired of hauling several hundred pounds of boats down to the pond 3 nights a week (actually getting too old to do that). 2 years ago I sold off 42 model boats ranging in size from a one foot tug boat, to a 10 foot USS Missouri. Then, staring at 62 feet of empty workbench, I decided it was time to build a railroad. Chose "N" scale becasue I built my sons an n scale layout back in the 70's and had enjoyed doing that.
Biggest challange in going from large model boats to n scale was in getting used to the demensions. It took me a while to get the hang of it, and get things to look right. Last year I made my first attempt at scratchbuilding and n scale rr car, it was a model of a pile driving car built in 1901. It took first prize in a small sctrach building contest. I am now in the process of building some old flat cars and ore cars from the same period, and of course just working on the layout and scenery as time allows.
As spring approaches I will be taking time away from this hobby to devote to bicycling, I like to get in 150 to 200 miles per week when the weather is good.
George