It is NOT a requirement to have your weightloss index image, your big journal status image, your favourite thumbnail, link to your website(s), your favourite quote and the list of all your bikes all together in your signature.
Yes, you can have a few of these however consider that if your signature becomes too chunky, it stops relaying interesting info to other readers and becomes an annoyance in a thread.
Tip - test your signature to ensure that it is working and doesn't have syntax errors or link errors that show a broken image.
So - compact signatures are the way to go.
Cheers
Christopher

