As I posted a few days ago, I'm hooked on Pokemon all over again after having neglected the series since Red/Blue. I'm considering doing a little bit of backtracking after I beat Diamond and have mostly completed the Sinnoh Pokedex.
So I'm looking to eventually play both Emerald (a friend who has moved far away has both Ruby and Sapphire) and Fire Red (my friend has Leaf Green).
My question to you is, which should I go for first, or does it really matter? I know Fire Red is sort of first chronologically (I have played through Blue way back when), but Ruby and Sapphire were released before Fire Red and Leaf Green, which Emerald is a remake of. But Emerald was released AFTER Fire Red and Leaf green.
Is there any reason I should do one or the other first due to connectivity, or would you recommend one or the other first due to any advancements between games, or what?