I may sound like a technophobe, but I'm not - in fact I am a gadget head. But I mostly hate bluetooth (the part that doesn't hate it is the attack and penetration side of my brain, which has had fun playing with the seemingly unlimited number of interesting vulnerabilities in bluetooth.)

I can think of no use where I would choose bluetooth over another method of communication.

• In the car I want my phone plugged in to charge it, so why not have audio connected too?
  
• For personal networks - I prefer wires - obviates jamming and is way faster
  
• For larger wireless networks - 802.11 with EAP, TKIP, RADIUS and a sensible set of firewalls
  
• 3G or GPRS for my laptop - uses a PCMCIA card. Why waste my mobile for data calls?
  
• For keyboard or mouse - having to run on batteries is a pain, why not just have a wire?