Shakespeare?

Honestly, it is very difficult to choose. Sometimes I like the last sonnets, those to the dark lady, like 138, "When my love swears that she is made of truth", because of the mirror-like image of the lovers lying to each other and knowing that the other one is lying. But I also like the sonnets to the young man, because many are about writing as well, such as 76, "Why is my verse so barren of new pride".