Kuhli Loaches, aka Coolie Loaches look really cool. They are like little bandy-bandy snakes in your tank. Problem is, they are hard to cure of white spot (like most other loaches) and they always hide during the day. The first lot I got died from white spot. That was about two years ago. The survivor was thrown in a 4 foot community tank, and is rarely seen, but he is still alive and has grown quite big.
The two photos above are from when they were young. The one below is much more recent.