About two months ago, I rediscovered my love for Pokemon. When I had first gotten into it, my age wasn't even in the double digits. Back then, it was all about the creatures and battles. This time, though, my focus is much more centered around the human characters.
Their designs and personalities are just as diverse and colorful as the Pokemon they train/interact with. What's really neat is that, thanks to the fact that Pokemon games get released every couple of years, there have been dozens upon dozens of new human characters for me to study. My "studies" are possible thanks to the fact that a very detailed wiki exists for all things Pokemon called Bulbapedia (click)
However, no matter how many new characters get introduced, I still have the biggest soft spot for the Generation I characters (esp. from the games). They almost feel like "old friends" in a way, because I first "knew" them when I was only a kid. For this reason, I really liked the Pokemon Origins miniseries, because it was basically a love letter to those of us who grew up with the Gen I video games, rather than following the path that the anime took. I especially liked the way that Origins handled the characterizations of Professor Oak and Giovanni. But now I'm just getting off on a tangent. ^^;
And, I definitely agree with the OP that revisiting old interests is a comforting thing. I first regained my interest in Pokemon when my nephew was born, which was a pretty chaotic time in my life. After things settled back down, my interest in Pokemon waned a bit. Now that that same nephew is currently hospitalized with a severe illness and things are even more chaotic than they were before, I found that my interest in Pokemon is kicking back into high gear.