Hi, I've done a quick search inside the wish list, so...
I was reading Ice_Stovo wish about stamina... but then was named to get packed somewhere when you are tired.
This wish
'Making a fire' should include some new items and a new skill.
Item.
wood
flint and silex stones to start a fireSkill
making fireTo make fire you have to have a good Intelligence level.
You have to train 'Making Fire' with a trainer that can teach you the basics
The more you train, faster you get the fire and less wood you need.
Stones should be obtained by a quest (or a series of quests, like the access to the winch)
Wood should be grabed from the trees or ground around (like apples) [I see apples fall from trees, so it could use the same mechanism]
Fire could have a time value to disappear - like some spells. But this time should be a little longer

I don't know much about mechanisms in game, but could be like this: get wood, get the book of fire in your mind and one stone in each hand, and you can start trying to make fire. As I said, more training, less time and wood spent.
Beasts could be attracted to the fire (like the nearness of a players do) and incite them to target a player and attack.
Well.... now the why.
Because ITs fun making fire outdoors, and camping... A fire makes you 'stay' in a place.
Now the guilds could have meetings and reunions in the wilderness, embraced by the heat of a good fire.
You can see when a player is camping outdoor because the fire... or see the lights and start investigating.
I think would improve the roleplay... I personally love the fire at Kada's but it's a little lonely when nobody is around.

I can't think another good reason than RP.
What do you think?