The screwdriver is pretty over-used. More often than not I don't mind because I simply love the device... but sometimes it's used for absurd things. Dreamland is chock full of ridiculous screwdriver uses. I think RTD has acknowledged the over-reliance though. I think the worst actually is when the Doctor uses it as a tricorder-type device... I don't really get how it can do that for anything
. Vibrating things, turning things on/off fine, but scanning?
And the convenient use of deadlocked doors as well. At least Donna, or possibly River, had the sense to just kick the damn thing in.