I prefer HDR images that look more natural. In this example, the use of HDR tone mapping is very blatant; the adjacent blown-to-white and nearly-black areas of cloud are a dead giveaway as is the completely unnatural-looking black area in the edge of the mountainside just to the right of center. But in spite of this, there are large areas of the clouds that are clipped to textureless white. The usual purpose of HDR technique is to avoid clipping, so that some kind of detail is maintained throughout the image. I would redo the blending so that the black area on the mountain edge goes away, and so that there are no large, featureless, blown-out white cloud areas. Overall, you have a strong image; it just needs a bit of work to be all it can be.
Just my tuppence, YMMV.
Thanks very much for your thoughts about this image. It's actually not an HDR image. It is just a single image where I used tone mapping (Photomatix plugin for Photoshop CS3). I didn't strive for a naturally looking image and tone mapping does indeed create som unnaturally looking images no matter what. You are right there is clipping in the brightest part and I didn't feel this was unnatural at all. Actually on the contrary. It would look rather strange if there was no clipping at all in the areas where the sunrays go through the clouds.
I made a different development of the image using no tone mapping and entirely in Lightroom with a graduated filter to tame the light from the sky.
Here it is