Pretty much in the title but our less intellectual readers this is where you post your ideas for the forum.
For example I'm going to start the ball rolling!

Make the /roll command give a better advantage with better weaponry. I've seen servers where the cp's get an added bonus on each roll, working in a sense but also over-powering them, why not do the same thing but with a weapon... for example if I rp getting a pipe it gives me a +2 on the roll, nothing to o.t.t but something to make things interesting.

Could easily be abused. Anyone could conveniently RP a knife when they're about to get into a fight, for example. That, and +2 is a little too underpowered. Rolls are very rarely that close.
On the other hand, I agree that due to certain special factors such as training, some characters should get minor bonuses to rolls. I just feel that this isn't the best way to implement it.

Yeah, but a knife would not kill instantly thus giving the victim a time to take another turn and possibly shoot the target before any further damage is done.
Plus knives would be hard to find in a half-life set game, pretty much all citizens were checked for things like this upon entering.