I can't compete with the Tag, Omega and Rolex crowd here (especially the solid gold Rolex s@#t), but i love my watch simply because it is Eco-Drive and solid Titanium (i hate heavy watches):
I have to agree there is a huge difference in weight between Titanium and steel watches.
I have a picture of the Titanium watch from Citizen that has become my daily watch and it is pretty light. I also own a another Citizen watch that is steel and currently it is off getting repairs but it is noticeably heavier (though I am looking forward to getting it back)
I use to think Titanium watches where over rated in how much lighter they where until after I got one for Christmas this year. Other nice thing about Titanium watches is there will be no nickel in them. That also happen to be one of the big reason my mom got me the Titanium one because I am allergic to nickel and I can not wear anything with nickel in it. Some of the steel alloys do contain nickel and she just did not want to take that chance. Plus it is oh so much lighter.