Too flat/gray for me by quite a bit. It just sort of blends into the page and my eye washes right over the image without lingering.
This happens when an image is overly HDR-ed in the wrong way. Does your program have a "local contrast" slider or similar? If so, I'd bump that way up for starters.
Also, taking an image of a large, evenly-colored subject with similarly colored sky behind it, etc. is already a bad recipe for dull gray HDRs. Why did you feel this was a good candidate for HDR in the first place? The normal file probably has much nicer contrast and would make me want to look longer, I'm guessing.