Biology teacher.
Played rugby, came in several time with huge black eyes. Biggest oddity was his sheer hatred of squirrels. Brought a dead one in once to dissect it for us, and fuck it stank! Also admitted to shooting squirrels whenever he saw one.

Geograpy Teacher.
No fucking clue. After catching someone on porn on a school PC (as culprit had left the projector on), he was asked "show us your collection then sir". And he did.
50 pictures of steam trains he'd taken near Manchester. Oh, the horror.

We used to play "Teacher Tennis" with him.
The idea was to get him to come to your desk, and ask increasingly retarded questions to keep him there. You got a point for each minute you distracted him. He never caught on!

Chemistry teacher
Various scars and injuries, and used to point out the chemical accident's that he'd got them from.

EDIT: Also the lecturer I have who spent a quarter of an hour explaining how he'd heard of the Neighbours Soc here (they watch Neighbours)
and how sad they were, writing "sad" on the board to prove it.
( Labmonkey last thought about having another coffee on, Thu 10 Nov 2005, 18:25, Reply)