Leonhart
Imagineer
I completed the Alolan Pokedex a few days ago and feel satisfied I was able to achieve such a goal. Do I want to do it again? No, I figure completing the regional dex once per generation is enough.
I used to work on filling my National Dex on two games per generation back during the R/S/E and D/P/Pt days, but now that the amount of Pokemon has doubled, I've become lazier so I only do it once now.