I realize it is just a search function based on your user ID, but I miss the old version.

When I clicked on My Posts I would get those little icons showing if there are any new posts in a thread that I have contributed to. This really helped me maintain my participation in an ongoing discussion. It is easy to forget about a post you made in some forum and My Posts was a quick way to stay on top of all the discussions you were a part of.

I also like how My Posts was thread-based rather than post-based. Now, I get multiple results for My Posts from every single post I make in a single thread. This just crowds the My Posts page with repetitive information. I always used My Posts to find the threads I posted in. I never needed to know that I had 3 posts in a given thread.

What I would request:
Bring back the icons showing if a thread has new posts since the last time you visited.
Return the default view of My Posts to show threads, rather than individual posts.