A document reader program should be unobtrusive. When you get a document on your computer that it is supposed to handle, you should just have to double-click on the document, and your operating system should open the associated program. It should do this quickly, without a lot of fanfare. The document is the focus of the user's attention, not the program. There should be nearly no need to open the reader program on its own, without a document; although, a link to the program in an appropriate folder on the Start Menu isn't uncalled for, should such a need arise (e.g., if the user wants to manually check for updates or change default settings for the program, he shouldn't have to find an irrelevant document to open first).
To these points, I say:
Adobe, quit installing an icon to Acrobat Reader on my desktop, without asking, every time you do an update; get rid of the bloat that causes Reader to take half a minute to open a document (running a service or pre-loading half your program into memory when I haven't even opened a document yet is not an acceptable option); and when I say "disable the splash screen", do not ignore that setting or re-enable it and think I won't notice.
Yes, I'm aware of alternatives, such as Foxit Reader, that aren't nearly as bad; unfortunately, I have to keep Acrobat around for those forms and bills that alternatives aren't able to process.