Good detail. Are you in a built up area if so the lights from the buildings / road make it harder to get good shots.
Then step away from the building! You have a great sky, but you have not given the shot any central point. What lens are you using? I'm guessing 35mm.
Let us know your camera settings on these shots. The stars seem pretty sharp. How would it look if you doubled your exposure time? Might be worth a try.
And consider star trails (search on here). If you want perspective, consider trees or other natural sh!t.
I'm figuring this out, too!
Why tungesten? This is something I would like to learn also