Should I share my extensive notes summarizing literature in my field?
Pros:


Contributing to an open and collaborative scientific process


If you've put a lot of work into something, it is great if that work can benefit others as well. If you can save another researcher a bit of time, or even better provide them with some inspiration, that is great for science in general.


Raising your profile as a researcher


It's almost always a good thing for people to know your name and be aware of what area you are working on. If people read your notes and find them useful, this will give them a positive impression of you and could make them more likely to collaborate with you in the future.


Provide motivation to continue updating your notes


Pretty sure it's an established psychological effect: if you share your goals with others it provides incentive to meet those goals.


Ego boost


As you said yourself, it would feel good!

Cons:


Possible negative impression to authors you are critical of


You mentioned that a lot of your notes are critical of the papers you read. I would say this is normal - we tend to focus on weaknesses when we pick apart a paper. But to the author, this might create a negative impression if they feel that you are unfairly harsh, or that you get hung up on details and don't "get" the main point of the article. On the other hand, researchers tend to be fairly thick-skinned and will be used to dealing with criticism.


Unlikely to be formally cited


Given that your notes don't contain much in the way of original material, they are unlikely to get cited. People are more likely just to cite the original papers that you refer to.



Overall, you can probably tell that my personal opinion would be to go ahead and post them - it sounds like a very positive step. But it might be worth spending a bit of time checking through your more critical points and perhaps moderating them slightly, or balancing them against something positive.