What if you were in a predicament? You have two games you could run, either Planescape in ADnD 2E or Dark Heresy? How would you argue the benefits of one over the other - leaving system mechanics out of it?
I have a DH game on haitus, and am currently running a PS game, but am debating going back to the former. The Planescape game has been going pretty well, but I've had an itch to run DH as of late ... the catch is, I've made a bargain with my players that if I start another game I will run it for no less than 4 months. (otherwise, honestly, I'd probably change every month)
So ... which should I do? And can you go about convincing me or one or the other?
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