At first I thought you were asking what our favorite city is in real life I was gonna say TA. I bet 99% of the people reading this thread thought so, since the thread title doesn't mention anything about the Pokemon world and this being in PCG and not General would also have given that idea.
You should probably edit your title... leaving it here since it's a Poll and Pokemon related Polls are alright here as long as its clear.
1. My favorite City... I thought Sootopolis was pretty cool how you have to enter it from underwater.
2. How you enter it was a cool idea... and the fact that it's an actual City with a gym and stuff and not come secret place is interesting.
3. A lot of cities are boring... guess I'll go with Oldale town since there is NOTHING important there.
And by the way my favorite REAL city is Tel Aviv.