Another show I"m surprised to see drop is Truth or Consequences. I had it in the 30s. I fondly remember the syndicated version in the early '70s and I thought its long run would pull it into the top 50.
I've tried to watch Truth of Consequences, and I get the sense it's a product of its time. I think it was popular because it was something the TV audience wanted back then. Other shows did what they did - House Party, Candid Camera, This is Your Life, etc. - so I never got the feeling while watching it that it left a great legacy to TV, it was just part of a trend. ToC gets remembered in mainstream game show lists & articles because it had a history, but not because it was a wonderful show, IMO. For fans at large in a vote like this, who seem to value good competition, it has trouble finding a spot.
I also had Celebrity Sweepstakes on my list, but with only two episodes of it around most of the series is just hazy memories at this point, so I can see why it wouldn't make it.
Celebrity Sweepstakes is another one that fell off my list deliberately. I've been lucky enough to see more episodes of this lately (for instance, there was that documentary on comedian Billy Braver made recently, and the full episodes surfaced with some people in LA). In many of the shows I watched, the audience seems stuck on one celebrity as the longshot, and the contestants keep betting on that one star. One contestant inevitably makes a windfall, while the other keeps using them to catch up. The effect is one star out of six doing much of the talking (90% of the time with no attempt at a zinger) while the scores end up something like $1,080 to $8. I did enjoy episodes where the answers were verbal, because they moved faster, but I didn't get enough of those before the ballot to say it deserved a top 50 spot again.
One show I had ranked quite high is Break the Bank, and it's slightly disappointing to see it drop so far this time around. As Matt said last time - this was "the one that got away". The show had high ratings during its network run but was cancelled in favor of the network expanding the soap operas to 45 minutes. It probably should have had a much longer run than the 15 weeks it got.
I forgot to check into this show once I got access to ratings data, and your comment piqued my interest. For starters, we're talking about 2:30 PM, when CBS had on Edge of Night and NBC had Doctors. Before Break the Bank, ABC had a number of shows try to go against the soaps. Big Showdown largely had trouble keeping up with its competition. Edge of Night began losing viewers around the time Rhyme & Reason took 2:30 on ABC. Rhyme won the time slot for its first 8 weeks on the air, then lost to Doctors for the next 8. Eventually, CBS puts Guiding Light on at 2:30 instead, while expanding As the World Turns to an hour. Both moves help CBS.
The Neighbors took Rhyme & Reason's place and went neck & neck with Doctors - but both shows lost to Guiding Light. Break the Bank comes on and averages a loss to both shows over the first 9 weeks of its run (pulling a 26 share to the soaps' 32 & 27). Then, Break the Bank starts to gain ground over Doctors. On July 12, Hot Seat and Family Feud premiere. Two weeks later, with Break the Bank still losing to Guiding Light, but now beating Doctors more decisively (29 share to 25), One Life to Life expands as you said, and Bank goes bye-bye.
Barring any notable exceptions I'm forgetting, these are the days when a network ordered a show and kept it on for the length of the deal. So while history shows Hot Seat would have been the better show to bounce off the schedule, I think it was a matter of bad timing for Break the Bank.
That said, with regards to the top 50, I couldn't pick Break the Bank as a candidate for "greatest." Points for its cool music, set & game mechanics, but minus many for entertainment. Hollywood Squares wasn't a wall-to-wall house of fire for comedy even in its heyday, but Break the Bank struggled to get even one memorable zinger per show. The shows without the forfeit-the-box-automatically rules are hard to watch.
As for Go, I agreed with Clay - I like the game mechanic, but Go itself was not a good enough show to merit a rank from me this time around.
-Jason