In showdown I notice that a lot of the people participating in it, tend to get stuck in the middle for some reason. Sometimes when I play showdown, I usually go into the middle to clean them out, but I usually leave as soon as I do. Some people like to fire into the middle from the outside, I usually wait for them to come out though. If anything though some people tend to stay away from the middle.
If anything though, I also tend to stay away from the far eastern and western sides of the showdown map, due to the excessive amount of barrels.