I enjoyed Video Pinball a great deal as a kid. I either rolled the score or got a ridiculously high score (don't remember which) simply by using the generous "nudge" mechanism to keep the ball hung up on an upper scoring tunnel. It certainly wasn't like real pinball, but it was a fun game taken on its own. I believe this was probably based off the Atari arcade machine--I suspect this to be the case, though I have not done the research. In any case, it looked very much like the arcade machine I saw when I went to FunSpot in New Hampshire.

As for Kaboom!, great audio-visuals, particularly for the time, and very easy to pick up and play. However, I never considered it a classic (it too was based off an arcade game and many clones were also produced) because it was just a bit too simple for my tastes and the difficulty ramped up a bit too much. I know I"m in the minority on that one, though.