Heheh.
GotM (3): UK 1st Edition Trade Paperback (rarest of the lot), UK Mass-Market Paperback, US Hardback
DhG (4): Proof copy, UK 1st eds TPB and MMPB, US HB
MoI (3): UK TPB and MMPB, US HB
HoC (2): UK TPB, US HB
MT (3): UK TPB, MMPB and HB
BH (1): UK TPB
Healthy Dead - Signed Slipcase Hardback, #334
Blood Follows - Nightshade illustrated edition
(on order) The Lees of Laughter's End - Signed Hardcover
Esselmont:
Night of Knives - Signed Slipcase Hardcover, #dunno
Non-malazan:
Devil Delivered - Signed Paperback, #472
Fishin' With Grandma Matchie - Signed Paperback, #I can't remember
When She's Gone - Paperback
Every single one of the Trade Paperbacks and novellas are 1st editions, and the others are 1st print runs of the later editions.
Well, you asked