Originally Posted by
Shamanic
Inscription is by far my biggest money maker. Doesn't matter that people only buy the glyphs once; there are always people making new characters / trying out new specs etc. I see no advantage to having inscription on multiple toons though; other than the fact it's one of the easiest to level (imo) and means you don't have to bother getting the shoulder enchant rep.
I have one alchemist of each type to get the bonuses, it's a very easy prof to level and means I don't have to bother someone else when I need flasks / pots / transmutes etc.