I realize I have a lot of replies to catch up to, but I've actually been busy doing...... -wait for it- waiiiit for itttt-- work! Sorry!

(hopefully I'll continue to be lucky enough do a lot of that for a while, but I definitely intend to get back to all of you when I can.)
I have a question for those of you who get/do commissions and maybe it's asking for your secrets, but I would very much like to know how much you charge for your work and how you determine a price. If you don't want to discuss it publicly, a note from you would be wonderful....please!!!
I've read all kinds of books on pricing art, I've calculated the time it takes me to make something, the trouble it will cause, the difficulty or easy-goingness of the client... but I'm still not quite confident about quoting prices. I don't know if I'm asking too much or too little. My prices sound reasonable to me since I know how much time I spend on something, but sometimes people make me doubt myself and I start wondering.... "Am I charging too much??? Do I think too much of myself???"
I know we've been over this before but I just think that "outsiders" have no idea what it takes to make a great drawing or a great painting. Truth is that if I'm creating art for a living I need to make enough to cover all sorts of expenses. Therefore I'll determine a per hour charge based on my skills just like most professions would and I go from there. Sometimes when someone asks me how much I charge for a portrait for instance I think to myself -size, materials, hours, detail-. I then enter it into my nifty calculator and come up with a price. Sometimes the price looks about right, and sometimes it blows me away. I think to myself "No one's going to pay that much for this even though it is a lot of work".
Am I thinking this because I'm used to people wanting things for free? Too many people out there assume that since art is so much"fun" for me, it must be a privilege to want to draw something for them. Or am I thinking this because I overprice myself? I just can't tell!!!! That's where you come in. This is why I'd like to know how you do it.
Though I asked my question already, I need to rant on. It bothers me that so many people out there would love to have a beautiful custom painting hanging on their wall, but they wrinkle their noses when you tell them how much you expect from them. If I sit there for two weeks painting.... having no time for anything else..... how do they expect me to live??? I need food, shelter, clothing.... all the things they need too. Just like they, I can't sit on my ass for two weeks for $200.00 (hypothetical price) So then another question. Let's say I agree to such a silly price.... should they budge on the deadline? I guess if I had two months to work on it I could fit other things in as well on the side in the meantime.
Why do so many artists go unappreciated for their skills, work and talents?? It took us a lifetime to get where we are today. It's not something you wake up with, and oftentimes it's not something just anyone can learn to do, no matter how long they attend school for this. It drives me crazy. It drives me especially crazy when talented people practically (and sometimes literally) give their work away for free.
Oh.. and then there are the people you know don't have a lot of money, but you want to be nice and budge on the price for them. I'm all about making people happy, but where does the charity end??? I wish mechanics and doctors felt charitable toward me when something goes wrong. That would be nice.
Don't pay attention to me. I'm just bitter because I didn't become a doctor instead.
I guess art is just one of those professions that isn't vital to man's day-to-day survival. Don't worry, my brain is working on solutions to my dilemma. I'll figure out some genius plan or scheme and that's when the world shall tremble before me!!! I'll make them pay!!!! -literally-
Of course I have more to say, but I really need to get back to work now.