To be fair, sometimes its different:

I use an X360 pad, so its automatically done for me.
No issues.

It isn't. Its a SecuROM anti-piracy lock that kicks in if you're using a pirated version (Basically, either the glide function doesn't work or if your grapple gun doesn't work in some places)

You're supposed to be using the GFWL client to do it. It should automatically do it if you sign in with a LIVE account.

To get the DLC, you need to launch the GFWL windows app (That looks a bit like Windows Live Messenger), login, and head over to the marketplace to download it.

There is, but only for the consoles.

The PC GOTY edition will come with these console only DLCs.

If that's the case, you'll be needing the GFWL windows app that opens up the Marketplace. All DLCs for any games you have can be located there

You tried using an offline profile?

Well, I finished AA with a Xbox 360 controller. It was great.

Then when I tried AC with a keyboard and mouse (Because I left my controller behind) and even though it took getting used to, it was quite ok once I got used it.

So, when I finally get to try it with my controller again, that's when it becomes really difficult.

AC introduces perhaps double the amount of gadgets to use, which makes it very difficult to switch weapons with a controller compared to using a keyboard.

Anyway, long story short, AA is ok with a controller, AC is better with kb/m.

Nah, haven't gotten any of the DLCs yet. Already bought too many other stuff this sale (Plus, my copy of Batman is from Gamersgate, so I can only get the DLCs from the GfWL store)

The biggest issue with the use of the controller in AC is that since all your gadgets are tied to the D-pad and since there's about 12 gadgets, for some of the gadgets you have to press the d-pad button multiple times which makes it a bit of a pain to use. Plus, that also means quickfire is a bit tedious to use on it.

Eh?

I played AA with a controller and there was an option to invert the controller at least.
I played AC with keyboard/mouse and I could invert the mouse as well. In fact, you can choose to invert just the regular camera or only during flight.

If I had to play through AC without inverting my mouse, I'd probably be vomiting blood by now since the game relies so heavily on vertical spaces.

Well, I grew up playing flight simulators on the PC using a mouse and so that control scheme kinda stuck.

He has a small cameo in Arkham City. IINM, in the sewers near Wonder City and the subway station.