Ever? Yes as a child, not understanding anything and counting down the time to when it was over.
Now, not really, I don't go to synagogue because I figured out a long time ago that since I don't understand hebrew, and don't know the rituals, it is pretty much pointless, they might as well be doing the service in Greek, and not being a hypocrite, I won't go not understanding anything, and simply going through the motions for appearances, to me that's worse than not going at all;
Also, in my estimation, going to a reformed service worse then not going at all, I agree it's better to convert to Christianity than to be reformed, at least Christians aren't watering down Judaism, so I'm honest with myself and ultimately with G-d, better I don't go, then go and spend the whole time looking at my watch wondering when it's going to finish, your heart has to be in it or why bother. I do fast out of respect, but goodness knows I'll brush my teeth.
Here's the thing, I'm secular, but I'm not a self hating imbecile. Kahane's got it right, Chaim's got it right, Israel is for the Jews.