On her lap.

You know why.

Location 3, position # whatever is comfortable and towards the action

How does this inane question have 50 upvotes? And why is everyone answering it? Is this just a bunch of AIs talking to each other?

My favourite pondering spot is on the armrest of one of these chairs.

Either end with the armrest. I like being tucked in the corner.

If it's one of those sectionals that has the long chaise cushion, I'm taking that end and sitting on it like a bench.

Awesome question, actually! My sister in law had a couch this shape (L shaped, asymmetrical). And it was oriented this way, with the TV across from the short end. I don't think that's quite right, but they had a narrow room. I'd put the TV facing the long side, so four people can sit. Come to think of it, that's how my uncle did it with his.

At my sister-in-law's place (she's since moved, so this is going back about 20 years now!) I sat on the space between the leftmost two cushions as you look at it. That won't be comfortable on every couch. It was on hers. The reason was, she always took the corner, but she was small and kinda nestled herself in there. My nephew would lay to the far right with his elbows up on the end. It seems to me that most little boys like to lay down in the most uncomfortable position possible, and as long as they're tuned into what's on TV, they're happy to do so. My SIL's loser boyfriend would be between them, under her legs. As for my niece, her spot was next to wherever I was, so because she was so small, I'd sit half a space from the end, and she'd wiggle into the end space.

That corner spot is looking pretty sweet.

I usually sit right where that book and mug are in the picture, and I can just slide my way into the corner if I feel like.

The furthest away from anyone else that is also sitting there. If alone just lie flat on it.

On one of the edge seats. Usually on the right side, when facing the couch, because because phone charger is there and the left edge seat is overwhelmed by clutter.

In the corner, it is objectively the best spot.

The corner, under a ton of blankets

Short side because it's TV facing (in my living room). Edge seat because I like the arm rest. It would be even better If the arm rest was to the right, but my sofa is a reverse L.

I don't sit on corner sofas regularly enough to have a standard seating position. In that picture I think I feel inclined towards the junction of the sofa.

Head on armrest facing window.

Surely Sheldon should be here commenting on this?

Lie down, legs over armrest.

On the floor.

Corner spots only