I don't think it looks horrible and for the most part it is better than the flashy crooked lined skins before it.
However, as Justintime mentioned, the black is horrible for day time visibility. Currently I am using FP for various reasons. The only skin I will use is Frigors high contrast white day skin, and black night skin.
It makes a HUGE difference in daytime visibility having the black text on a white background. On the same note, it is blinding at night with just a white skin. As such, some sort of automated skin switching ability would be VERY helpful. The whole gamma thing is just a bandaid.
I should mention that I am not the most fond of the FP autoswitching as the sunsets at different times throughout the year forcing me to continually change the settings. I also don't think it is a good idea to require the GPS data to determine time of sunset unless you use some sort of port replicator and can get the data regardless of what GPS software you use. Maybe some online data can be downloaded every few months or updated when a connection is recieved as the weather plugin does? For all I know, your weather plugin could already contain that data.
However you do it, a night and day skin is the only way to go until newer daytime legible screens are more common.
Keep up the good work!!