I HATE the flicker from LED Christmas lights. With Halloween lights it doesn't bother be as much since Halloween is a spooky and eerie holiday. But Christmas is supposed to have a sense of warmth, which LED lack. I think the lack of radiant heat from LEDs actually makes them seem like a "cold" light source. Lighting has an effect on the body (our biological clock evolves around the color temperature and intensity of light (sunlight), but with artificial light, our biological clocks get screwed up. Scientists are doing studies to find out why there's a sleep epidemic now and why everyone is tired 24/7 and it has a lot to do with newer lighting sources and backlit electronic devices. The chemical serotonin is produced by the body in the presence of light. However, it can only be produced properly in full-spectrum light. HID, fluorescent, and LED lighting is not full-spectrum. Of course, aside from LED, those lighting technologies have been around for decades but people don't out outside as much now, and inside people's homes, incandescents were typically used, which provide natural full-spectrum light.
And yes, I hate those stupid green ends too, not really because of the fact that the ends are green, but because Philips is just doing that to call attention to their lamps. "Oh green ends, it's a Philips lamp!" It's just an attention-getting gimmick. And yeah, the green ends look ridiculous in a nice vintage fixture. They look fine in a modern fixture though.