Big Questions, Short Answers
MooTools, jQuery, or Prototype?
Moo first, jQuery second -- learn both and be twice as powerful.
XHTML 1.1 or HTML 4.01?
Not all that concerned but I would prefer XHTML. Lets just decide.
Whenever linking to another website or opening a non-webpage file (PDF, DOC...)
PHP, Rails, Java, or ASPX?
Whichever you dominate in and whichever suits the project best?
No. CSS should be learned at the most basic level and built upon until mastery.
Industry Standard or Customer Request
Educate the customer but know the limit -- who pays the rent?
RSS or Atom?
I've had far less problems with Atom.
Learning: Sink or Swim?
You've either got it or you don't -- harsh but true.
The "Right Way" or Quick Way?
Depends on the budget -- ALWAYS!
Server-side or Client-side?
Server-side for control and reliability, client-side for flair.
Pixels or Ems?
Monitor sizes aren't that different yet, so pixels are fine.
Usability or Functionality?
Functionality always -- how well can you train?
Silence or Distraction?
Music or movie during coding is a needed noise.
Web Developer or Webmaster?
Do I even need to answer this?
Few words usually means many arguments. What are your thoughts?