The Powershots only go down as low as f8, don't they?
So when I took my first night photos with my Powershot, in the pre-dSLR-days, these kind of "soft stars" were all I could get, too.
Now I can get much starrier stars, and still I sometimes think TODAY that my really sharp, starry stars (by an f22 or so!) are too much! I still have to find the middle ground that I like best, but that means I would need to go shooting at night, and I haven't been out shooting for fun in MONTHS now. Always and only on commission ... oh, those were the days, when I only pursued the hobby for its mere fun...!
As to your photos here, for me there is a bit too much black around the light in the first, I'd consider a crop, but hey, that's me! You might have wanted to achieve something all different. What do I know.
I best like the second.
The lighttrails in the third produce this emotion of UTTER URGENCY inside me. So yes, it does produce a STRONG emotion in me, and that makes it good as a photo, doesn't it? But I don't like that feeling!

Reminds me of nightmarish dreams I sometimes have when I have to get somewhere or need to achieve something and more and more puts itself in the way of my getting there or achieving my goal and the sense of urgency rises and rises until I wake up...