I'd be interested in hearing about experiences with Metafont from those of you who have put effort into it. How far did you get and how much time did you spend? Any advice for others who would like to try?
Drawing characters/symbols on graph paper is helpful for being able to determine what points should be.
MF is a really nice language to work with. It's macro-based like TeX, but because it's not intertwining with text presentation, it doesn't feel as awkward as TeX programming does. Among other things, it's effectively an algebraic solver system.