There is 1 shot in table tennis that will really hurt you.  But before I tell you what the shot is, I’ll first make a couple of observations about your body positioning.
 
If you attack with your forehand from your forehand side, it doesn’t really matter where you attack.  You should mix up your placement – wide forehand, wide backhand, and middle transition.  Because your body is centrally located in relation to the table, you will likely be able to recover quickly for the next ball.