All characters can see an immortal character leave the room when they're sneaking.

You can fire ranged weapons while in water (Not necessarily a bug, but something I changed in mine)

Hiding an item (A weapon, usually) will cause it to be hidden forever.

Any sized item can be hidden in any sized container.

Increasing Idle Time/Buffer size, is almost an absolute must. I cannot make a "clock" item using mprogs, because max was simply 1 too short to accommodate my needs.

Changing order to look for mp at the beginning of the command, rather than the entire command, that way there are still a few things with mp you can use in an order: "Order monkey emote clumps a pile of dirt together.", I did this so that I would be able to allow pets to use mpcommands, for lots of different things, say you needed healing, so long as you were a friendly, a healer hireling would heal you, if you bribe him etc, or say a young dragonling would grow as it gained levels, into an adult etc.

Changing saves to just Will, Reflex, and Fortitude... still working out exact formulas to how I like though .

"Wish" channel, allows the mortals to chat up just the imms, asking for divine intervention, help to rp with a mobile, etc. etc.

Wear