For all intents and purposes, it started and ended with the anime. The show probably had the most longevity to me, and when I stopped watching that was probably when I stopped focusing so intently on the franchise. Yeah, I played some side games afterword, but with mild interest.
The first 50 some episodes of Pokemon, though, will always be my favorite because without them, I probably would've wrote Pokemon off. I'm not even a fan of RPGs to be honest.