It is annoying when anyone tells me their bike is the only type of bike bla, bla, bla but what is worse for me, THE WORST is the people that don't even ride telling me that I should have bought a Harley! Come on people!!!! They stand there with a straight face and tell me why I should have bought a Harley when they have:
a) never owned a Harley
b) never owned a bike period
c) have probably never read a motorcycle test in their life
What is up with that!?!
It's even better when they start the conversation by first asking if the bike I'm riding is a Harley (Extremely bad start if you're about to lecture me on your incredible knowledge of bikes!!!).
Rant over 
Are you saying... That bike in your avatar... isn't a SPORTSTER?? omg.
Seriously though, I love ALL bikes. The most fun I had with work people ever was our monthly road trip that we had when I worked at Film Roman. One of the guys would pick out about an 800 mile roadtrip for us to do. We'd go.
In that lineup was:
BMW r75/5
BMW 1100gs
Race prepped gsxr 600
70's harley chopper
Honda Shadow
BMW 600gs
Older Katana
crazy early 80's Kawi 750 frankenstien ratbike (that thing was crazy, and would pull on most of these bikes from 40 to 110)
And we would pick up 3 to 10 random riders of ALL sorts for part, or most, of the trip.
Didn't matter what you rode.
It was all waves and bug-laden grins the entire way.
We got the biker hand signal from nearly every biker going the other way, no matter what they were riding.
We, as a group, being motorcyclists, need to realise we have something important in common. A love for the road and two wheels and wind and sunburned skin, of feeling happily exhausted and sorely content after a spirited canyon carve or a long range cruise.
The comradery of our similarities should outweigh the differences in our personal taste of bikes.
We help each other on the road, even when we don't know each other. We wink to each other as we pull up to the rock store or cold springs tavern or any other place we congregate. When we come to a place that isn't only bikers, we tend to sit nearer to each other than the people that came on the tour bus or SUVs.
We are not cagers. We are bikers.