We think that, as a big fan of this sort of heroic fantasy, I love all our children equally. But I love David Gemmell books more equally than the others. So take this as the view point of a massive fan - Legend is an excellent book at the start of an even better series. We even like the backstory of the writing of the book ('like' probably isn't the right word). Gemmell wrote the first draft of the story as a metaphor for the cancer scare he was going through - with the story being set around the attack of a fortress.
Legend was first published in the 1980s, so if you are expecting cutting edge fantasy, this isn’t the book for you. It is, however, a classic example of an important fantasy book in the ‘Swords and Sorcery’ type books that got us to where we are now.
It’s good. If you are even half interested you should just read it.