Business News daily has a nice summary called the Best Tablets with Stylus.
I use the pens of my Lenova X220 Tablet PC (windows), Samsung Galaxy Note 4 phone (Android, Verizon) (or phablet) and my Samsung Galaxy Note 10.1 2014 edition tablet (Android) daily.
I was checking out the review Best Tablets with Stylus because the X220 is getting old, but is still quite serviceable and because I am tempted to move to the unified environment of Windows on all devices, but that is currently too costly and may leave me with a phone incompatibility unless I swap it out. Yes I want all three devices to do the same thing and run the same programs -- too much to ask?
Another cool thing for the Samsung Note family, it allows the syncing of the proprietary S-note between the tablet and phone and makes them available to the desktop. Not perfect, but really useful. I am an Evernote Premium user and for my use would think of nothing less, but you can explore the features at this Evernote link.
PDF Max 4 which will allow you to read, annotate & edit PDF documents and fill out PDF Forms! You can check it here and like Evernote it will let you annotate pfd forms on your phone and tablet (I use the android version). There is no desktop equivalent.
By the way I used to be high on Bluebeam.com for desktop annotations of pdfs and it is an excellent program, but they do not have an Android solution. They do have an iPad solution. That is where they lost me.