I was never an avid stamp collector and I still play Pokemon. To me though the over abundance of the monsters has become rather silly. I mean I felt that 141 or so was enough content. Personally a few more legendary or "rare" species were the only additions that I thought were necessary for the game at the time.
Now I see some weird Pokemon with equally weird names and weirder abilities and appearances. I'm just like, "WTF?"
It's sad.
However I still have to applaud the folks at GameFreak for developing Pokemon and adding to the franchise for soooo long.
EDIT: You know the very first seasons of the Pokemon series was the best to me personally and then when they got rid of Misty and started adding some weirder characters--I started to dislike it. I mean Ash, Brock, and Misty were the shit to me back in 3rd grade, lol.
Oh and I forgot to add that the newer generations are very playable to me despite the fact that the new Pokemon are really weird to me.