Straight

In the absence of supporting information, I tend to take the first option offered to me. That's because in a situation where all alternatives are of (apparently) equal value, the most efficient option is preferable - that is, to take the least time in choosing one. In this case, I would go right because you listed it first. Now, if you showed me a picture of a forking path, then asked me the question, I'm not entirely sure how I would approach that.

I take both. Pick one, go down it, then always go down the other to make sure iv missed nothing. My initial choice depends on the game, mission, and whether i can see anything interesting down that route

I am right handed.

I usually go left because I want to go right.

If I go left, I get it over with, so that I can focus on the right. lol.

Of course, I assume we all eventually take all paths. Just which do people start with until you see a door or a staircase before you backtrack and try the ones that must contain treasure.

Right.

I go right and I'm right handed.

I go left and I'm left-handed.
I go clock-wise if there are more.

I pick whichever one seems to be a dead end (gut feeling). I explore that area for treasure then backtrack to the correct path.

I usually try the right-hand path first. I'm right-handed.