PCGS Price History (price performance)......what is your take on this?

Just messing around today and never did a price performance check on my coins so decided to
run a few coins today for giggles.
I know that grading curves and auctions have a major role in the price performance but still interesting non the less.
I also know there is no one way to get a true price performance from just one input but I think PCGS info is a great help.
I took a few of my coins at random including everything from a Washington Grate Colonial to a modern Ike in MS66.
Surprisingly(at least to me) the Washington Grate performed the best and the 44-S in MS66 faired the worst.
Anyone else do this? If so what are your thoughts? Does this or can this influence coins collected?
Years 2004-2013

run a few coins today for giggles.
I know that grading curves and auctions have a major role in the price performance but still interesting non the less.
I also know there is no one way to get a true price performance from just one input but I think PCGS info is a great help.
I took a few of my coins at random including everything from a Washington Grate Colonial to a modern Ike in MS66.
Surprisingly(at least to me) the Washington Grate performed the best and the 44-S in MS66 faired the worst.
Anyone else do this? If so what are your thoughts? Does this or can this influence coins collected?
Years 2004-2013

CoinsAreFun Pictorials Album
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CoinsAreFun Toned Silver Eagle Proof Album
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Gallery Mint Museum, Ron Landis& Joe Rust, The beginnings of the Golden Dollar
.
More CoinsAreFun Pictorials NGC
.
CoinsAreFun Toned Silver Eagle Proof Album
.
Gallery Mint Museum, Ron Landis& Joe Rust, The beginnings of the Golden Dollar
.
More CoinsAreFun Pictorials NGC
0
Comments
My Collection of Old Holders
Never a slave to one plastic brand will I ever be.
two broad categories of coins have done well:
1) coins with a lot of gold, MS62 and lower Saints and Libs, and generic gold in general.
2) ultra rare date coins - the cream of the crop.
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CoinsAreFun Toned Silver Eagle Proof Album
.
Gallery Mint Museum, Ron Landis& Joe Rust, The beginnings of the Golden Dollar
.
More CoinsAreFun Pictorials NGC
WS