My dad didn't have the very beginning of the Lensmen series, starting at Galactic Patrol, and he had most of the D'Alemberts and a couple of the Skylark books, but from the age of 10 onwards (I still look) I hunted down everything in and out of print by Doc - my parents have on their book shelves, all of the Lensmen, D'Alemberts, Skylarks, Subspace, Lord Tedrics and I'm fairly certain all the one offs he wrote too - I even own a book written after Doc's death from his notes written by Stephen Goldin (co-writer of the D'Alembert books) which follows Worzel the dragon-like lizard from the Lensmen series.
Because I read the stuff at a very early age I have a very soft spot for Doc as a true "space opera" creator.
There isn't much space opera out there anymore (that I've found)
Other childhood and now adult favourites were AC Clarke and Asimov, Harry Harrison, Frank Herbert and more recently Greg Bear, Iain M Banks, Alistair Reynolds.
As an aside does anybody remember the 100 page throw away efforts in the Perry Rhodan series? The pulp fiction of SF!
