I was looking through the Popular Photos "all-days" section here:
http://www.pbase.com/galleries?view=pop ... period=all
I took the time to go ALL the way through the section, which unfortunately I don't think many folks do. I was shocked to find so many outstanding photos had way fewer votes than they deserve! For example, the first pic in the list below had only 4 votes! I happen to know it won POTD for Chuck Hall, so surely folks would be voting for it if they had noticed it!
I think this discrepancy is because
most folks just look at photos in the 7-day list because it's the default setting, so if a photo hasn't received a vote that week, it doesn't appear. Many newcomers and those not used to browsing the Popular sections may not even be aware of the 90-day and all-days options. Of course these overlooked pics were in the 7-day list at one time too, but that was often before voting for individual photos became a common practice, so they really didn't receive their fair share of exposure.
Also, I think that when folks DO look at the 90-day or all-days sections that they only look through so many pages then get tired/bored, so the good ones in the second half are oftened missed completely.
Please take some time to go all the way through the Pop Photos "all-days" section (link given above) and I think you will find that many excellent photos have been lost at the bottom of the pile and forgotten.

We can fix that by giving them our votes.
Some of the many outstanding but overlooked photos:
http://www.pbase.com/image/20530442
http://www.pbase.com/image/20041815
http://www.pbase.com/image/25979200
http://www.pbase.com/image/22131046
http://www.pbase.com/image/26233939
http://www.pbase.com/image/7973980
http://www.pbase.com/image/23409869
http://www.pbase.com/image/1015439
http://www.pbase.com/image/24859068
http://www.pbase.com/image/25189005
http://www.pbase.com/image/1970708
http://www.pbase.com/image/24899931
http://www.pbase.com/image/660064
http://www.pbase.com/image/22572261
http://www.pbase.com/image/22341378
http://www.pbase.com/image/7902911
http://www.pbase.com/image/14847824
Note: Notice also that in the all-days section some have way more votes than they deserve, and these usually occur in batches that have the same person's name under them, have the same number of votes each, and are clumped together, which means the votes occurred all in the same time period. I have to wonder how one person can control so many votes, but we can't unvote a pic, so we have to encourage more folks to vote for the truly deserving ones so they will pass up those whose votes are not legit.