I have been playing pokemon since Crystal came out but i never really did much research into how i make my team, what kind of moves i use, or abilities until recently when i've gained access to wifi with the latest generation games.
Since i started exploring all the things i had been neglecting i have completely changed the way i play the game.
It's just a basic thing considering, but for me, the abilities and hidden abilities have changed my gameplay the most. Before i would just catch a pokemon and level it, really just caring about its type and moves alone, but now i'm more careful about which ability i choose.
The scrappy ability for Kangaskhan, the solid rock ability of Camerupt and Tirtouga. These have made a huge difference in my game play.
Recently, i've gotten into the nature game, still don't fully understand it though and i have only barely noticed a difference between one nature and another. I am starting to be able to spot a difference between one wild pokemon and another of the same name but I'm still learning.
Next i plan to work on breeding but i still have a lot of homework to do on natures and abilities.
So, what in the past generations changed the way you play the game permanantly? For good or bad.