As an historical note, this difference in publication between the plays and the sonnets is relatively weak as evidence of Shakespeare's own personal estimation of either work. The decision to publish or not to publish has some pretty clear economic motives. Sonnets were more profitable the more they were circulated. Showing them to lots of important people and getting a reputation for yourself was a way to receive patronage. Publication could make you some money too if enough of the reading public liked them, and also would add to your potential circulation among potential patrons/flatter all those people who get dedication poems etc. in print.Quote:
And yet while Shakespeare puts forth the effort to publish his "real" poetry, he doesn't give a second thought to his plays.
Publishing plays, on the other hand, could lose more money than it would gain. In a copyright free age, publishing a play would mean that other theaters could steal it and make a profit off of it, thereby losing your theater money. Most theaters and playwrights in the period really don't want their plays published because that was putting the words out in the public domain, and enacting words was their business. It would be a little like Andrew Lloyd Weber posting the complete book and musical score to his newest musical on a security free website with no claim to copyright attached. That's one likely reason that there are so many variations between the published quartos of the plays: because some were probably compiled from the memories of actors who performed the roles and/or from surreptitious note takers/memorizers in the audience of performances. Naturally plays were published more legitimately when they had more or less run their course in the theatres and the author or theater managers thought they could make some additional money off of the publication, but the big money focus was the use of the script for performances, and the publication of a play wasn't really regarded as a big claim to fame or literary worth.
It wasn't until 1616, the year of Shakespeare's death, that we get the combined ego and classicism of Ben Jonson and the publication of his (that is, Ben Jonson's) monumental first folio. Jonson was really quite an innovator in terms of the sorts of claims he made for the status of theatrical entertainments as "high" literature (of course, to get back to the economic side of things, he was also making a fair amount of money at court from Masques and other court dramatic entertainments rather than relying as heavily on public performances as Shakespeare apparently did). It's very hard to say whether, had he lived a few years longer, Shakespeare might have personally responded in kind with his own publication or might even have been planning to do so anyway, regardless of Jonson, since he had retired from the theatre and might be able to whip up a little modest retirement fame and fortune with such a publication. In any case, we all know that his friends did so in 1623, and if you've picked up a facsimile of Shakespeare's First Folio (or even the real thing) you'll see that economic concerns continued to motivate, both in the patronage dedication to the Earls of Pebroke and Montgomery, but in the address "To the great Variety of Readers" which begins:
"From the most able, to him that can but spell. There you are number'd. We had rather you were weighd. Especially, when the fate of all Bookes depends upon your capacities: and not of your heads alone, but of your purses. Well! It is now publique, & you wil stand for your priviledges wee know: to read and censure. Do so, but buy it first. That doth best commend a Booke, the Stationer saies. Then, how odde soever your braines be, or your wisedomes, make your licence the same, and spare not. Judge your sixe-pen'orth, your shillings worth, your five shillings worth at a time, or higher, so you rise to the just rates and welcome. But, what ever you do, Buy. Censure will not drive a Trade or make the Jack go. And though you be a Magistrate of wit, and sit on the Stage at Black-Friers, or the ****-pit, to arraigne Playes dailie, know, these Playes haue had their triall alreadie, and stood out all Appeales; and do now come forth quitted rather by a Decree of Court, then any purchas'd Letters of commendation..."
It's a fascinating statement for thinking about the economic motives behind performance and publication, the shift toward addressing a slightly wider reading public rather than only an elite patron, and the shift from thinking of a play as something you go to hear and something you might like to read, clearly something they feel they may need to convince the potential literate buyer is a worthwhile enough activity to shell out the money for the volume.

