So I'm looking to start reading some Deadpool but have no idea where to start at? Anyone have any input on which Deadpool books are worth reading?

Deadpool: Merc with a Mouth was pretty fun. It banked on the Marvel Zombies stories a bit since it involves Deadpool working with Headpool, a zombified version of himself that was reduced to just a head, as they work towards returning Headpool to the zombie universe.

deadpool/cable is supposed to be funny. i can't remember which issue it was but wade admits he has naked photos of bee arthur....mmmmm bee arthur.

That is also the name of his blimp in Merc with a Mouth - Bea Arthur.