I didn't start smoking until I was around 29 or so. I started off with cigars, then bought a pipe. Lately I've taken to smoking "little cigars" which look exactly like cigarettes but have cigar tobacco in them.
Why? I tried it just to see and found that I liked it.
Why not? I don't do it often, I don't inhale any smoke and I don't spend a lot of money on it. Seriously, I spend less than seven dollars every two weeks. Just smoking a pipe I can make $4 last more than a month, and still smoke really good tobacco.
The tobacco I smoke has smooth pleasant flavors, and after eating a nice meal or having a few good drinks, a little puff is a great way to cap it off.
Plus it pisses off whiny faggots. I used to keep a big, obnoxious cigar on me just for smoking in bars when the people next to me started getting on my nerves. Good stuff.