Do others ever undertake to evaluate their own betting strengths and weaknesses by way of reviewing performance over a period of time?

I have recently completed a review of my own betting for the racing season just completed.

Some of the most startling facts I discovered included:

distance range
worst - 1201-1400 (this is also where I had the most bets!)- I am not sure what to make of this as it is very much worse than the other brackets?
best - < 1200

field size
worst - 13-15
best - < 8

note - significantly poorer SR and profitability on fields > 12

metro track (min 10 bets)
worst - Randwick (slightly over Kensington/Inner)
best - Sandown (not a huge sample)

Provincial results were also considerably poorer than metros.

I hope I haven't bored anybody with this small piece of self indulgence however I hope it encourages you to have a look at your own operations. (this will of course require diligent record keeping)