I don't know if this will be useful for you, but I kind of think of dirt pedals in two categories. The first is "neutral." The second is "colour." "Neutral" pedals are for when I'm basically happy with my basic guitar/amp sound. Examples are the Timmy and the Zendrive. Your sound is still the same basic sound, only you get more of it (in terms of volume and/or gain). "Colour" pedals are for when I want to substantially alter my basic sound. On the subtle side this would be something like a TS9 (for the mid bump). But mostly I'm thinking about amp-in-a-box designs (lovepedal, Tech21, etc.). Something to think about anyway. My fav pedals of the first type are the Timmy and the Zendrive. I really like the good ol' MXR Distortion+ too.