Yeah it's all about what you like. If you like straight forward lyrics write straight forward lyrics. Most pop songs are very straight forward (at least by my standards) some are less so, but if thats what your going for the simpler the better. Apparently most people don't like to be confused when they listen to lyrics and it's been my experience that Americans specifically cannot handle any amount of real complexity without getting upset (in general). Just look at movies, they are the most straight forward things ever. And particularly in action movies they will have characters repeat the bad guys plot or whatever like three or four times (just towards the end they usually go over it one or two times at the beginning too) because otherwise people get confused.

I think my favorite part of "No country for old men" (besides the movie of course) was listening to how pissed everyone in the theater was when it ended. I was floored and all I heard anyone else do was complain about how much it sucked.

sorry, bit of a tangent but you get my meaning. The Beatles pulled off a few ambiguous songs because they were light and fluffy and lots of fun regardless of whether they actually mean anything. But the Beatles were also pretty pimp song writers and had done tons of straight forward pop songs long before their psychedelic days where actually their popularity started to wain and people got pissed at them. They where still a huge band but people (particularly in America) got pissed when they started introducing deeper meaning and such into their songs.

But there again do what you like if you do it well people will notice.