Where to Move in Somerville

Hi r/boston

I keep seeing posts reference young professionals moving to somerville, but what area in Somerville do young people usually move to? E.g. winter hill, davis square, west somerville, magouin square, porter square, etc.? I am in my early-mid 20’s looking to move into a vibrant area, but I’m not sure where it is all at. I am not really concerned as much about the cost, I just want other people’s perspectives on good places in Somerville.