Now with research and new items making tradeskills even cheaper, and me only rarely needing buffs (and yes, I still have IPs left AND my defenses and the one or other weapon skill maxed. it works. try it!), I only charge little fees for jobs that require a lot of clicks.
For Alien armor, Arul Sabas, some new Albtraum stuff I usually ask for a 1-2mill tip, or 500k for medium-work things like VTEs or nano crystals. This DOES include ME purchasing consumables like nanowire, furnaces, carbon rocks etc. (getting the parts myself saved me from a lot of hassle dealing with people who either do the math wrong or are too confused to buy right QLs etc..)
I don't get mad at people who don't pay, I just take mental note of their names and will adjust my reaction time to their OOC inquirys accordingly in the future.
I DO, however, get openly mad at people who try to sell crafting tools (MRRs, Alptraum tool, SL buff rings, FF helpers) at 50-100 mills to tradeskillers who provide their services cheap or free. Want tradeskills done cheap? Don't charge a premium for our tools.