Okay, here's what we do in this thread. Pick a forum member with some attribute/habit/idiosyncrasy/cryptic sig, etc., that amuses you/confuses you/makes you feel funny inside, etc. Then post your "What's the deal with..." question here.
A few rules:
1. They must be a member on this forum.
2. Play nice, kids. This thread is for lighthearted banter and mutual forum member appreciation. If you want to gnaw someone's jugular, there's another forum for that.
2a. To help safeguard rule 2, you may only post about members you like. So remember, anyone you refer to in this thread implies your unconditional, mushy, slobbery love for said individual.
3. You may not reply to or discuss anything about you. Doing so would spoil the fun. You can only discuss other members in this thread. If you really have to comment on yourself, start a separate thread. SolitaryWalker will be dispatched there shortly.
I'll kick it off:
What's the deal with Rhinosaur's avatar?