I'm a CM fan, 95% of the time. I've used D-ring and post-bound too, but for specific reasons.
D-ring works well for my Heritage albums because family members are constantly giving me things to add to it, and it's easy to add to a D-ring. I bought one post-bound because I couldn't get over the cover (beautifully embossed leather pattern) that matched the theme of the album so well.
I love the durability (life-time replacement!) of CM, though, so since I want my albums to be looked at often, that's what I'm sticking with for the rest (my childhood and family) of the albums!