That arbitrary choice was in respect to exploration. If thats not true then what decision process do you use to decide which path to take? What factors do you take into account?
My equipment, strengths and weaknesses, known spells ... really a lot of factors. It depends the most on map layout. Here's an example:
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#.#Assuming I came from south I would venture south-east now because I see a room there. Being a warrior I dislike being caught in middle of a tunnel by an archer because that will force me to take few arrows to the face. And if its a dragon? Few breathes might be not as survivable. If I am an archer cooridors are good places most of the time.
In caves I try to stick to walls with my melee characters because this lowers number of creatures that can swarm me. With spellcasters I wade though middle of open areas hoping to amass critters so that I can blast as many of them as possible with a single area-of-effect attack.
In ZapM I leave dark rooms for later preferring to go around whenever possible.There may be a facehugger hiding to jump at you out of darkness.
In Rogue I try to guess map layout to minimize backtracking. Food is important.
One area I find too complicated is the number of weapon choices that seem to have little difference between them. It makes the decision of which weapon to keep a chore.
If you know they have little difference why bother with detailed analysis? Pick one at random. Crawl is especially guilty of this. Weapons having damage with attack delay plus unclear skill bonuses make for a frustrating choice. I ignore that and pick weapon with neatest name. :-)