Creepy, but loneliness and insanity are.
Just a simple lol really :)
The way i see it, and this is after my first run through, salad finger is a troubled little girl who,after having some sort of mental brake down, went insane and is now reliving her life in a far "stranger" way.
A little stale, I think. I've gone through all the Salad Fingers episodes in the past few days and have grown re-attached to the series, but at a certain point (somewhere between episode 4 and 7) it seemed to get stale. Back when we could never predict Salad Fingers' behavior, the animations were fresh and intriguing. Now, the complete lack of coherence has become a norm and it downgrades these animations from artwork into a novelty.
The biggest problem here stems from the lack of characters. Although Salad Fingers runs a pretty good one-man show, he can only entertain (or scare) you for so long. You've introduced a couple characters in the series, but most seem to be the result of Salad Fingers' delusions, and the rest simply have no speaking role. Incorporating a new major character would give the series a bit of a boost; you could write in character interactions and make something of a plot. Alternatively, you might also have recurring events lead somewhere to suggest an overall plotline. Madness Combat did this quite well, starting with mindless violence and slowly evolving into a pantomimed story without losing the charm that made it popular. It's time for Salad Fingers to make the same evolutionary jump.