In this note I would like to describe a variety of my problems which I would classify as my favorites. Of course, I can't guarantee that they are all 'acorns', but because many have thwarted the efforts of the best mathematicians for many decades (and have often acquired a cash reward for their solutions), it may indicate that new ideas will be needed, which can, in turn, lead to more general results, and naturally, to further new problems.
In this way, the cycle of life in mathematics continues forever.
This is not intended as a record of when the solutions actually happened, or how quickly problems are being solved - they may have been solved weeks, months, or decades earlier, but it took time to verify or just be notified about the solution. This is just when their status was changed on this site, and has no meaning beyond that.
