its not enjoyable... its ADDICTING! hehehe
i'm just starting to edit Davao City, and in my opinion we should not use Highways/Minor Highways, just about in every big road, since i believe only Luzon has it, NLEX, SLEX, etc. so for the major roads i just use Primary streets, and others as streets. much easier to handle
I'm plotting first the primary roads, deleting any node/junction so to make one long continuos segment for the entire length of the road name (since we have lots of roads with one name on one side of a junction, then another name on the opposite side :X), then just add junctions manually for every intersection. that way connecting segments can be done systematically.
it also helps if the map is relatively bare, so there are few erratic segments, but there are some long traces which didn't coincide with any street, so i guess some pilots failed to turn off their Waze before flying