Haven't really targeted walleye that much, but I recently caught one while kayak fishing with a little swim bait.  Do people go by length or weight when they talk about their personal best walleye? I measured the one I recently caught.  My PB in length is 21 1/4, but I didn't have a scale to weigh it.  If you're interested, the video of this fish is below.  It's caught around the 11 minute mark of the vid if you're interested.