When I first started out, I used the secondary method for all my beers b/c for one, I thought it would aid in clarity and flavor. And two, that's what all the kits said, and these companies must know more than I.
At some point I started leaving them in primary for 3-4 weeks, and I've made excellent beers since. It makes racking easier b/c it creates such a compacted yeast cake, which surprisingly gives better clarity than the secondary method.
My latest brew, a mint chocolate stout, will be my first secondary in a long time since I need to add the mint component to secondary.
Happy brewing!