Actually, come to think, the modifiers for tasks would work in the opposite ways for me and the client. Ie for boring/horrible jobs for clueless clients I probably work slower and with less inspiration, while for fun jobs for great clients I work faster and better; so for the things that I would want to charge more (because I personally suffer) the clients would probably want to pay less, and vice versa. Which would make the system feel horribly unfair for us, *precisely* because it is precise (while current, horribly imprecise system works, and is perceived as fair - I believe on both sides -, because it largely rests on the unspoken contracts).