Another two attempts at long exposure photography

I just can't seem to get the hang of it. The shots always turn out over/under exposed, out of focus, or just plain ugly. It is quite annoying that I can never get what I want. I must be missing something here. I do dig the ghostliness of myself in the first pic though.

Another two attempts at long exposure photography

Both pictures were 30 sec exposures, both were f/4, the top picture had an ISO of 400 and the bottom pic had an ISO of 125. No PP. Also, it was 10 degrees and snowy when I shot these.