When I was recording my album Skeleton Coast (just buy it already), my producer made cheap drum machine tracks for me to follow when I recorded my basic acoustic guitar, so we would start the recording process with everything in solid timing. One of the songs ("Totally Low Standard Blues") gave him trouble, and he couldn't figure out why. Then we got into a brief argument about timing, because he swore the song was in 4/4. Eventually, I convinced him it was actually in 6/8 time, and we got the track done no problem. He did, however, inform me that I was weird.
Most rock, pop, rap, and a decent amount of country is in 4/4 time (du du DA du, du du DA du). As a result, most musicians who don't have formal training are more or less used to 4/4, and anything else gives them a bit of trouble. If you play country, 3/4 timing slips in the mix (think waltz timing--DUN du du, DUN du du). 6/8, though, is a rarer bird.
Recently, I've had developments in my solo career which have pushed me towards preparing solo rock shows, without a band. I'm going to bring my electric and play with some strange pre-recorded drum/percussion tracks (I test this out tomorrow, so expect a progress report later this week). Of course, this means that I need to pre-record said pre-recorded backing tracks. Last week, I tackled "Totally Low Standard Blues," and even though I wrote the song, the 6/8 time signature still gave me fits. This is one in a long line of hints that I might be a weirdo.
Yesterday, I realized that one of the songs I'm in the middle of writing is also in 6/8 time. Maybe I'll do enough of these that weird time signatures become second nature. Or maybe I just like to make things difficult.