I was just like you, didn't start with Pokemon games until playing R/S/E.
D/P were alright but extremely slow, I did enjoy Platinum a lot for fixing that and the extra Pokemon. HG/SS gave me that Johto experience I never got to see originally.
But oh man it was B/W that got my ego going thanks to the most interesting Pokemon, and you can't forget that mysterious guy N, can't ya?
And I'll be starting with B2/W2 next week! I want to see if it's awesome like what everyone thought.