Having done a bit of a buying spree of COIN games, and having read a lot of forums lately to get up to speed, I'd like to extend some credit to the series that, IMO, has not been done enough.
Part of the draw for me is the lead design work by Volko Ruhnke. He is foremost a good lead designer; his basic design is solid, and he works well with other designers to get the most out of it. Proof: at least 8 designs that sell like hotcakes.
Also, and not less, he is a pleasant presence online. His accessibility and impeccable manners help a lot in making at least me feel good about shovelling money his way.
So here it is: thank you Volko, for the good work.