I participated in the 10-25-50 Challenge for a couple of years -- and did quite well.
However, I think I stitched so much (and so fast) that I stopped enjoying it. So, I don't know if I want to do that again.
There's the "Crazy" challenges I've seen recently: Start 15 new projects during the first 15 days of January. Uhm... NO.
Then, there's the "only stitch from your stash" challenge and the WIPs only challenge.
None of those appeal to me, either.
My challenge will be... to stitch what I want, when I want with no obligations.
I will finish what I can... when I can. I won't stress over it or set any time limits. I will stitch for comfort... for stress relief... for the pure pleasure of stitching.
And I will not feel guilty at all! :)