Hola!
I'll chip in my views for the Gamer section only, as I'm hardly browsing any other section, EVER.
One section for Games - Yes. We don't need segregation of Games section into console, PC or even casual for that matter. Just keep it simple & sweet and have one unified section for games. It's easily identified and associated with.
Platform Tags for threads - I have seen this happening on another forum. Let's say I have a query specific to a particular platform (console or PC), I can click on the respective bubble while creating a thread and the result is you'll have a platform tag associated with it. Something like this:
*img171.imageshack.us/img171/733/53746008.jpg
Result:
*img140.imageshack.us/img140/7951/31896278.jpg
This will help specifying/associating the game for it's respective platform. I'm not sure if this is even feasible, but it's definitely a good alternative than having a separate console section, which is hardly frequented.
Prioritising Sticky Threads - I think we need to sort out the sticky threads and prioritise them. Does 'To be released games discussion' thread really need to be stickied? 'Content for Games' is stickied and locked. Pick a thread which would probably have information regarding something like 'the purchase guide of a console', 'newbies guide for upgrading to a gaming PC' or something like that. I keep getting a lot of PM's of which console to purchase, it's price, location, advantages etc. So it would be good to have a thread stickied along the lines.
Weed out to old/unwanted/spam threads - Let's face it, we have like a gazillion threads in the Gamerz section. Why not clean out some? I doubt we would have people bumping a Page 51 thread any time soon, unless it's a BOT. This should saves us some web-space and we could always create a new thread for a query, this would be a fresh start.
Reputation system - Not saying it's entirely needed, but sometimes people might feel the need to be credited for the work that they do. What better way to do it then a reputation system?
phpBB - Can we please have it back? Pretty please (with vanilla cream & cherry on top).