Someone else made a comment in another thread here about weird schematics (like for home appliances).
Wanted to get a small discussion going on that topic. My take: there are good and bad standards for schematics. Personally, I can't stand the ones that use rectangle shapes for resistors, instead of the traditional zigzag that [insert name of deity here] intended to be used. (And even here there are lots of variations, like old-fashioned schematics that took this symbol rather literally and sometimes had ten or twelve zigs and zags, as if an actual resistor was being constructed on paper).
Likewise the wire-connecting/jumping convention: here I much prefer the modern approach, which is to use a dot for a connection and no dot for no connection, rather than the clumsy "loop" to indicate one wire jumping over another with no connection.
Regarding resistor values: Who the hell came up with that new way of specifying resistance values, like "10R" "or 5K6" or whatever? And why use this system? I've always used the plain value of the resistance: 10,56, 5.6K, 56K, etc. Simple, obvious, requires no interpretation. Is this some kind of Euro thing?
In general, some schematics just look and feel nicer than others. A well-drawn schematic is a pleasure to read. A bad one--lines too thin or too thick, misshapen symbols, idiosyncratic interpretations, etc., just don't look right.
Feel free to add your own schematic pet peeves here.