Playing in the original video game is very good. when I was a kid I had only video games of "SEGA".
I never played original pokemon when I grew up and met the world of emulators, I went to look at the pokemon games was several titles I did not know by which to start which title you recommend?
It depends on your likes.
The originals are Pokemon blue, red and yellow but you could play fire red and leaf green which are the remastered versions with colour and good graphics etc if you don't like the older graphics for those.
Gold and silver also have I believe heartgold and soul silver if you prefer playing the new ones, but I have Pokemon Yellow, Gold and Emerald.