How Do You Prefer Solving?

It depends. There used to be a time when I was working on high point puzzles only, so I'd just solve the parts that gave me loads of points. That way I ended up with a lot of unfinished multis. Nowadays I mostly work on those multis, sometimes choosing for a quick 30x30 part of a 100 parts puzzle, other times I try to finish the real challenges. With the big ones, I try to leave the best part of the image for last - like the face of a person or the eyes inside the face. That way the final result will still surprise me, even though most of the puzzle has been solved already.

Jelga

I start with the first tile and go clockwise around the border. All the way to the center...

This is almost the as I do with Jig-saw puzzles (border first). The border is often easy, and dosn't hold much info about about the picture, but You get som idea.

I start with mid-time and then once I'm over abour 75% done I pick and choose to finish line by line. I usually save a central/key puzzle to be the final piece...

Mid time.