I wouldn't say I'm a fan, but I played some of the Japanese Rail Sim 3D games on the 3DS, and ended up grabbing a few when they were on sale.
I still haven't played the full versions, but I'll get around to it at some point. It's all actual shot 3D footage, so even if the "gameplay" isn't super exciting, it pretty relaxing to watch Japan go by.
Some of it has bonus tracks, where you can go through the same areas at different times of the year, or at different times of day, etc.
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I'll brave the storm to come, for it surely looks like rain...