What kind of artwork would you purchase (for yourself or as a gift)?

I am thinking about trying to make some extra money and am a decent-enough artist, but I have no idea what kind of stuff other folks like or would buy (for themselves or to give as a gift).

While I understand that beauty is in the eye of the beheld, do you prefer black and white (i.e., pen and ink), abstract or realistic, large or small? I am very curious to know what kind of artwork you might pick up and at what (ballpark) price.

What would go into your personal decision as to whether the price was reasonable or not? My sense is that most non-artists have no real idea of the amount of time invested in creating artwork, so I am curious as to your thoughts on that as well . . .