I've used a few different formats, but LEW uses the one I've used, which resembles many offline character sheets I've used.
Also, I dislike the monster formats (and the newer one even more) for the most part.
With spaces, it's easy to tell what's what, make notes, ect. Without spaces, things blur togeather a bit and become harder (at least for me) to read. I need to look up abilities if I don't remember them since they're no place for notes, and I don't have any good place to mention several situaltional modifiers to skills, etc.
Kolbyr (in my sig) is the other format I've used somewhat regularly, which is format heavy, but still works fairly well and allows for a lot of detail as well, particularly when space is not an insue online.
However, the sheets are for your use as well, so whatever works for you. As long as you don't mind me keeping my sheet in an sblock with my own format.

It's just my personal preference, no real big deal
