1 mirror or 2? what do you do?

[JustDucky]

Just the one.  Convex. And lots glances.  Then I found riding just a little quicker than traffic makes me much more comfortable and the single mirror is less of a liability as fewer "things" sneak up on you or park themselves in the blindspot(s). 

I found that two barend mirrors make the bike look/feel too wide.

[newbie_mike]

+1 to what justducky said.

I ride with one convex and find that the rear visibility is actually quite good.   I spend a lot of time on highway and lane split so most of the time I am moving a little bit faster than traffic (safer) so less worries about people coming up on my rear.

[NorDog]

One mirror works for me, and I don't even have to give up on the symmetry!

[WTSDS]

Why stop at just two ? I got two pairs on each side - Flat glass barends, and small convex, um, mini-barends.

Yep, the littlies were cheap and look like crap but they are really are the biz in traffic. Not so useful on the highway and that's why I have the plain glass as well.
 

The can of paint on the fence is about level with gear shift lever, and hopefully the insert shows the sideways view.