What are your best and worst coding traits?

[JRace]

Best trait: Perfectionism regarding the final product.  I usually aim to crank out the tightest, fastest code that I can.


Worst traits:

• Premature optimization, which can add to debugging headaches and delay the first successful run.  (see "best trait" above.  "Premature optimization is the root of all evil (or at least most of it) in programming." --Donald Knuth)
  
• Stalling the start of a major project by over-thinking it and trying to figure out the entire program before I start typing.  Once I've solved the major issues and have an idea how the program will look, the project becomes mainly a matter of typing and debugging.  I lose interest and I shelve it, sometimes forever.