Steady or aggressive blocking?
There are generally two types of blockers, steady blockers ("walls") and aggressive blockers ("jab-blockers"). Which are you? You should do both, of course, but it's usually best to specialize in one or the other. For example, David Zhuang (six-time U.S. Men's Singles Champion) is primarily a steady blocker. He can block forever, side to side, often changing the pace and even sidespin blocking. But when he sees the chance, he snaps out an often point-winning jab-block, which is made even more effective by the contrast with his usual steady but not-too-hard blocking.
A key to blocking is placement. Steady blockers mostly block side to side at wide angles, since a softer block to the middle can be hammered. Jab-blockers play the extreme corners and to the opponent's middle (playing elbow), rushing the opponent who has to decide between forehand and backhand, which often opens up a corner to jab-block a winner to. (This is because the opponent has to move to the middle of the table to hit a forehand or backhand, leaving one side open.) The nice thing about having a good block is you can get away with a lot of tactical things that others might not be comfortable doing, such as long serves or aggressive pushes. The opponent may have trouble with these, but if he does attack them, a blocker isn't worried since he's comfortable blocking.
Berkeley Open Results
Isn't it great how at the North American Table Tennis events, such as the Berkeley Open this past weekend (choose "Berkeley Open" from the dropdown menu), you can see not just the results (which most tournaments are slow to put up), but every single match played in each event?
The Amazing Michael Maze