I'd like to see more gloomy looking interiors. I mean the town hall for example. How is it possible that its so bright even with chandeliers and a candles. Maybe magic I suppose but does'nt that attract nasty things? The rock could also use to be gloomed down.

Two quest area's off hand I can think of that are mysteriously bright are Ogre Caves and Troll Caves. Both are very bright with seemingly no light source. I know you could ASSUME its fungus and such. But I'd REALLY like to see more gloom. It would really make lights more useful.

Turn your Gamma down?

Yes, most these places are fairly gloomy on my screen already, especially the troll cave.

The ogre cave though, that is rather bright and clean.

Ogre Cave does need to be adjusted to be in line with other areas, but my opinion is that people should adjust their gamma to what is best for their playstyle. There are people who have honestly told me that they'd play here but it's too Dark. Likewise other people say the whole server is too light for the Underdark.

So, my advice for everyone is to adjust the gamma to whatever you want.