The uncertainty of DnD

There's something I really like about DnD, that keeps me coming back for more, both as a DM and a player.

By the title, you have probably guessed... uncertainty. Another important factor would be improvisation.

DnD is the root to all video games, but something that video games will never be able to emulate. The DM, instead of the computer, makes all the difference. Players remain players in both universes.

What i mean is that, a player of video games has a limited options and actions available to him, that might or might not work in his environment, cemented in codes. The fact that a DM, human, is running the game instead of a program, allows for much rule-bending. For exemple:

In one of my games, in our earlier adventures, one of my friend was playing with a Ranger that had 2 light crossbows. Okay, now we know, you can't do that. At the time we didn't know, and it was just so cool. Anyways.

At one point, they are climbing a cliff while running away from a patrol of Lizardmen. The Barbarian climbs quickly, tosses a rope down to the Ranger, who in turn tied it up around his waist. The idea was that the Barbarian would lift the Ranger up while the Ranger covers their back with his crossbows.
Already, this is pretty cool.
Then, eagles who were nesting in the cliffs started to attack the party. At one point the Barbarian dropped the rope. Now this is where D&D really starts to differ from PC games.

The Rogue asks me if he can drop a crossbow to try and get a holding on the cliff with his free hand. Cool idea, so i made him roll a reflex check. Passed.
The rogue then asks me if he can try and catch the falling crossbow with his feet! Even cooler!
DO you get it? DO YOU GET IT?

You can actually convince the DM to change a few factors of the game. And if the DM is willing, well it makes the game even more interesting. Linear adventures are possible in D&D, but it's everything between point A and point B that make it the game that it is.

Now if you excuse me, i have a fighter-based Prestige Class to design. I'll post this here when i do it.

K tnx bye.