I have loads of pictures, and I currently use many programs for them, cos all programs have features I that are essential to me. I use XnView, ThumbsPlus, CompuPic, Acdsee, Picasa, IrfanView and even Adobe Elements.
Sure I use most of them sparingly, using ThumbsPlus for almost everything, but I've started using XnView more and more lately, as it does have everything I really need.
But.
The info window for file/metadata in ThumbsPlus is the one feature XnView lacks. With the info tab selected, you see the data, not the picture. It's very cumbersome to have to click to get some info, when you could as easily have the data like so:

Most of the other programs I've mentioned have such a feature, but they are badly done, or require a click. If that would/could be implemented, I'd dump the other programs without even a second thought.
Thanks for a great program!