I just wish the I could grab a 320 GB for like $50, then I'd just use the 250 GB for stuff I haven't played in years. Or maybe I should just get another Xbox console!!
Gears of War 3 is like 10 GB between the install and DLC
Halo4 is like 14 GB (I don't even play it but as soon as I delete it, I'll get tons of requests asking to play)
Civilization, Street Fighter 4 and Hitman are about 20 GB between them with install size and DLC and I'm playing this alot now. Then there is the 6 GB Alan Wake + DLC that I never even booted up.
I had to delete all my Borderlands DLC (which I never played), Oblivion, Fallout 3/NV DLC, Dragon Age DLC that I think was about 30 GB. Then there was the GoD version of Transformers I had to delete because of space.
But really, it's the Live Arcade games that eat up the space. Double Dragon Neon, Nights, Sonic Adventure 2, Shank 2, Dust, etc are all like 2 GB each and it just all adds up so fast.
"-i read a random post online about someone using a 1 TB HD on their slim, is this possible?"
IIRC you can use whatever size you want (by modding or external HDD), but the 360 won't recognize more than 320 GB.