While there is lots of debate about how much you should tip enchanters (if at all), I'd like to look at it from the echanters point of view. When I started getting nice recipes and enchanting peoples gear from the trade channel I often got annoyed when I'd enchant something and get no tip. This was around the time I was paying for my eternium rod and after buying most of the 0-325ish mats from the AH to level the craft, so I felt I was due some moneyetary reward.
I felt I needed to recoup my gold so always said 'mats + 5g fee' when responding to an enchant request (sometimes 10g for a rare enchant). This gurantees 5g from every enchant which although not much is still better than 0g tip. However I also found that when you state a fee, you get no tip at all. When I don't state a fee I often (but not always) get a tip of 5-10g, sometimes 20g if the person is feeling rich.
Which do you think is the better way of making money? A steady 5g\enchant (can add up over an evening or weekend) or the risk of no gold per enchant but the possibility of a big payout? Often even saying 'no fee, just tip if you feel like it' when asked the price can net you 10g, whereas if you state '10g fee' people will go elsewere.
What's an enchanter to do?!