Learning through past games

I have 2700 games I played on playchess.com in a pgn file. (many of these are duplicates) I am slowly reviewing my games with the designation c50-c59. These are all Giucos, 2 Knights, Traxlers all filled with examples of Man's inhumanity to Man ...Pins, Forks, Skewers, Missed Opportunities, Horrid Endgame and Minatures. It is quite instructive.

When I see a position where I am uncertain how I should proceed. I search for that position through out my other games then I search the million plus master database in Fritz to see what should be done.

Consider the following sequence:

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 Bc5 5.0–0

White has started down the agressive path with play 4.Ng5 against the 2 Knights when met with the sharp Bc5, he bailed out on his plan by castling seeking king safety. This is not a horrible move but inconsistant with playing the original Ng5. It's as if white didn't account for someone playing the Traxler and running scared. This is a good decision for someone unfamilar with the Traxler lines.

The funny thing in my games I have seen this position around 10 times. In the entire chessbase database which comes with Fritz, there is only 15 times out of a million games.
When I looked on Chessgames.com I only came up with this one.

http://www.chessgames.com/perl/chessgame?gid=1224785


This is a sign that some position are so bad that they very rarely come up in Master play.

I also came upon a number of games where 5.d3 is played. Another cautious move of which chessgames.com had only 3 examples. I have over dozen in my personal game database.

http://www.chessgames.com/perl/chessgame?gid=1226188

More to follow on this........
not alot of tactics this week.
I plan to spend some time this weekend on them.