There is a helpful summary of one's flags just to the right of one's flagging summary:
Your flagging history 1024 moderator attention flags 1023 deemed helpful 1 declined 512 disputed 128 posts marked spam 64 deemed helpful 32 posts marked offensive 4096 comments flagged 32 deemed helpful 32 declined
I'd really like each of the "declined" and "disputed" to be hyperlinked to a filtered list of exactly the flags I cast that our moderators didn't find helpful, so that I can more readily learn from my mistakes.
The existing interface means I've got skim through the list and look for the lines that don't say "helpful" among 14 pages of flags. (Your pages may vary.)