Huge Iain (M) Banks fan, think i've read them all except transition and matter. always loved the description of the garage with the array of land rovers outside the front of it as i've passed it many times, always makes me smile.
Crow road and either use of weapons/ look to windward for me as favourites.
think i'll have to give them all a re-read (although dunno how many times i've read crow road now)
Reynolds (absolution gap is brilliant as are many aspects of his other books), Asher and Morgan are both epic too (the Kovacs are superb but i also liked market forces). William Gibson is also another worth reading 9father of cyberpunk).
think i have 2 copies of diamond dogs, turquoise days after an amazon cock up!
for another amazingly diverse sci-fi try Victor Vinge – A fire upon the deep, was radically different to a lot of the other sci-fi i've read.