The first game I played, most recent game I played, favorite game, and least favorite game I've played in each applicable series. Series will be represented by first entry of the series that I played.

No particular ordering here.
Series must have a minimum of three games I've played, but I'll exclude spin-offs for most series (i.e., Hey! Pikmin is not in consideration for the Pikmin entry). If a series is large enough with a genre split, I'll split entries if I've played enough (i.e., 2D Mario and 3D Mario).