Favourite Pokemon:
I have a few, the ones I love the most are Venusaur, Charizard, Golurk, Aegislash, Lanturn, Mamoswine, Greninja, Pyroar, Gogoat, Lilligant, Seismitoad, Galvantula, Mudsdale, Salazzle, and the Alola forms of Muk and Ninetales.
Least Favourite Pokemon:
Watchog, Sawk, Throh, and the Spawn of Poke-Satan itself, Emolga. Even typing out the name makes me shudder.
Favourite Pokemon Type:
Ghost and Ground. I always try to have at least one of those two on any team I make.
Least Favourite Pokemon Type:
Probably Normal, not necesarily because it's bad or anything, but because I haven't had much success with pure Normal-types on teams in the past. Perhaps I haven't been using the right ones, I don't know.