I've never entirely gotten onboard of Deadpool. On paper (boom tish) Deadpool should tickle all of my reading spots: humour, irreverence, action, Ryan Reynolds man crush. But so far I'm still on the fence about being a fan. Admittedly I haven't read Joe Kelly's classic run, so maybe that is tainting my perspective.
So why read Deadpool Killustrated? Well, funny you should ask, voice in my head. I thought the premise and execution of Deadpool Kills The Marvel Universe was an interesting story: a very meta tale. After you've read Punisher Kills The Marvel Universe, you'd think that the idea of one Marvel character finding a way to kill all the other Marvel characters is pretty much tapped out, but the Deadpool version took that idea so much further. Killustrated is the logical extension of that story, and hence worth a read.
I'm only giving this three stars, however, as the story felt somewhat abbreviated/abridged (much like Deadpool Kills). The story concept wasn't fully realised, but still worth a read.