As of now, after both you and lfghjkl suggested me not to delete valuable comments, I'm leaning towards just deleting my account. (I've already removed my location from it as per ChristianKl's suggestion.) If I was in the Hyperbolic Time Chamber I'd delete all comments excepts those with positive karma which I wouldn't mind anybody I know reading, but...
(BTW FWIW I'm a “he”.)
Use this to find your comments that have negative karma (you do not have that many of those, it will not be that time-consuming to delete them manually) and/or contain certain keywords. Then you can delete them without having to delete everything.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.