I suspect DIYs are very personal things that your site wouldn't best facilitate, unless it were a searchable list or indexed in some way. Scrolling through potentially many routes is perhaps not the most efficient way to share?
I do, however, have a couple of nice, but hilly, routes up in Scotland that might be of interest to others (an 80km route around the Ochils starting in Dunning, a 100km in the Sidlaws starting in Dundee which includes two climbs of Craigowl, and will have others later this year when I try out some ideas I have in the Central Highlands) but then again, if people want to ride in a particular area, they can simply log into bikehike and plot out a route that best suits their needs?