[DISCUSSION] Which pokemon games should I play?

[Gentleman]

How do you do
I know you did not list gen 3 but I am currently revisiting Hoenn in gen 3 Pokemon Emerald myself. In my opinion its such a great game especially because of the battle frontier. Its really unique. 
Therefore, if you have some bucks left I can really recommend this game.   
For me its also about taking a trip down memory lane. Haha what a nice phrase. I did not know this one since I am not a native speaker. Thank you for the lesson :D
Have a great day!
Best,
Gernot