In bed pretty much all the time, Roll up the pillow under my chin throw the sheets over and I'm happy.
I have taken it with me to appointments but I'm not usually bad at waiting so I don't bother brining it most of the time.
I think to be honest alot of people play the DS almost exclusivly at home (unless your living in Japan).
Which is not a problem because the games are unique and differn't enough to make it worth playing it at home as a main gaming format.
"Wonderful innovative titles are 'sometimes' ignored [by consumers], while some repetitive titles with minor improvements in game play and graphics provide much better returns to the games publishers,"