Q. May I use your artwork as a desktop / poster / other nonprofit source of personal decoration?
A. Sure.

Q. May I use parts of your artwork in my artwork?
A. Yes, with a link back to me, as long as it's not for profit.

Q. May I use your artwork as a tattoo?
A. Ask first, but probably yes.

Q. May I take your artwork and pass it off as my own / make money off it without giving any to you?
A. No. Also, you fail life and/or copyright law.

Q. Will you draw my character / design my tattoo / paint me a mural / etc?
A. Tell me what you want and we'll negotiate a price.

Q. I'd like to offer you paying work?
A. YES PLEASE.

Q. I love you with all the fire of a thousand burning suns, can no longer imagine life worth living without you, and would like to have your babies. Will you marry me?
A. I like to deal with these on a case-by-case basis, personally.