I loved the Stumble In, but I like Left Field too. I'm always being accused of coming at things from Left Field--I take a mental path to things that others don't seem to do.
I look at the Stumble In as some place that you didn't quite know was there and you happened to stumble across it on your way to somewhere else. Once you stumbled in to it, you found yourself enjoying it greatly. So you'd gladly Stumble In to it again.
And I'll admit that I trip quite often and always have, so stumbling to me nas a nice feel to it.
The Stumble In got my vote.