4th Gen was my favorite actually. D/P was ok but not great. Platinum was sooo much better and it was done really well. HG/SS was fun. All the legendaries from previous generations were wrapped up into one. The Pokeathalon was fun. 5th Gen was my least favorite. Don't get me wrong, it had a good story, but B/W was kind of boring until towards the end. Plus I didn't like 5th gen's Pokemon ideas.