I just remembered a really extraordinary one. 

A house I'm moving into in January was built at several different times, and the detached garage was added much later.  The garage has never been finished but Mr. Handy Previous Homeowner had run power out there for the garage door openers and outlets for car engine block heaters.  The source of this power? 12/3 yellow Romex stapled to drywall and painted over in the mud room of the house, run down a trimless/unfinished door jamb in front of door hinges, then out under the hinge side corner of the lesser used side of a pair of double French doors! It then goes through a crack in the deck, where it runs along the ground and into some PVC pipe and into the garage.  Oh, so code-worthy, when two minutes with a drill through even a wood-frame basement window right adjacent to it would have made so much more sense. 

Every time I go in and out of that door working on the place I look at it and scratch my head.  I've done my fair of less than code compliant ones, but this one seems especially noteworthy.  Yes, through a door jamb, of a door that will invariably be opened and closed at times.  (At least the less used side of the pair of French doors).

I do hope that one of the first jobs you do is to put that right. 

I was using a set of step ladders without opening them up and they slipped, resulting in me ending up bashing my upper lip off a cupboard. Ouch!!

Spent ridiculously large amounts of money on lamps..! Over the past couple of months I think we must have splashed out over £500 between us   

Been there, done that, more than I care to admit! 

Stupid things I've seen : The entire second floor of my house is wired with SCRAPS ! My favorite is the wire that was too short and was extended with a short piece of wire connected with wire nuts inside the wall !!! All of the switch boxes have the neutrals and grounds joined OUTSIDE THE BOX !!!  I'm posting pics in my "WHAT THE ....." album in my gallery .

Fortunately no aluminum YET ! Just posted photos .

How about this?

http://www.youtube.com/watch?v=gWLX8jm_M1g

  And I thought the guys popping tubes in "40 Year Old Virgin" was crazy. Although I wonder if the studio used fake tubes without mercury.