I just finished the main campaign (Don't get me started on that ending...), and was wondering what single player missions or campaigns you guys might recommend. I don't do multiplayer, and I know ARMA is famous for its AI.. (or lack thereof), but I love the game and know that there has to be great stuff out there.

Thanks in advance!

good place to start, the MANW finalists:

Did not know about those! Thank you!

I recommend Hunter Six: Special Operations (http://www.armaholic.com/page.php?id=26759)
It is a single player mission that plays like a campaign. Many interesting features, such as team management and on-demand air insertion/extraction.

Driving and urban environments aside, I find the AI in ARMA to be far superior to any FPS I have played. Try assigning them to groups and use those groups to give Move orders rather than just "stay in formation". The "Engage at will" command can be very effective when you are on the offensive.

Green Draw is probably the most complete SP campaign I've played. Full voice acting and the missions are very well done. You can find it on Steam.

The campaign that won the MANW contest kind of sucked IMO (but is still being developed). But it's worth playing as well I guess.

Hunter Six is cool but it's totally different. It's basically Manhattan (the mission from Arma 2) in how it plays. Total sandbox and can get tedious.