So I know I'm very, very, very VERY late to the party, but I've finally started playing Pokemon Go today, after years of putting it off. I spent the day exploring the PokeStops in my town and catching any Pokemon I ran into, lots of Normal and Flying-types where I am, lots of Bunnelbys, Caterpies, and the Sinnoh Starters popped up a good number of times, but Aron is easily the most common thing as far as I can see. It's also handy that there are four PokeStops within reaching distance of my apartment, so I can farm items without even leaving home.
I haven't tried battling or Gyms yet, and really I'm a bit hesitent to, so I don't think that'll be my focus. My current Buddy is a 924cp Lairon named "The Metal", and already I've grown quite fond of him. Seeing as Arons are a dime a dozen in my town, I'll have the Metal evolved into Aggron in no time. I'm nearly at level 15, My Pokedex is up to 60 Pokemon, and I even caught a Shiny! Yeah it was a 10cp Wurmple but even so, something's better than nothing. I had enough Wurmple Candies to evolve it into Cascoon, but I can't think of a decent name for it so far.