How you can get a list of all the comments you have written? There is the "recent" -tab in user information but that lists only the 50 or so last events.
The way to do this now is to go to your activity tab and then select the comments grouping.
This will show them, most recent first, paginated.
Enter this as a query:
select * from comments where userid = 1431
You could extract them from the data dump.