I have to agree that all wooden needles are not alike; some are certainly better quality than others. I've used the Takumi brand bamboo and was happy with them, but I can't compare because I haven't use anything else. And since I bought my KP Options I use those for almost everything.
I also have to agree that bamboo needles are better with some types of yarn than others. If you're knitting with a thick wool, I think bamboo could be problematic; but if you're using a yarn that's slippery and fine, bamboo might be a better choice than nickel-plated needles. I know that the bamboo needles tend to be more blunt than metal needles (especially Options), so that's another factor to consider.
I was thrilled to have my bamboo circs, though, when I flew from California to Dallas-Ft. Worth last December! I was able to take them in my carry-on (with the knitting in progress) and no one said a word or even seemed to notice. I'm pretty sure metal needles would have been a problem in going through airport security. So, there's a time and place for everything.
However -- if you absolutely can't stand to use bamboo or wooden needles, that's fine! Don't worry about it, just use what you enjoy. After all, knitting's supposed to be fun!