I like creativity. Some signatures are so well done that they are pleasing to look at. For example, currently, I like Bitz and Spinly's signature designs (in case someone feels it's promotion, it's not).
Bitz:
https://talkimg.com/image/UNcvIb — Red-Black-White color combo is always attractive to the eye, and that twisted 'Bitz' word somehow fits proper.
Spinly:
https://talkimg.com/image/UNcFe1 — Can I just say, it's pleasing to look at?
Now, have you come across signature designs that you loved seeing? What you liked about 'em and If possible, can you show pic of it?