They all show promise! I do really like that overarching elm branch. I tried to think what could be removed but I like the overall "pipework" look, although to me it more closely resembles a haunted tree shape. The lack of leaves certainly add to this!

The looking lemon tree reminds me of all the ones I've lost, but luckily I still have their mother. Many were lost in bonsai experiments/practice. However, the better and more recent ones were killed due to my caretaker friend being careless while I was on vacation. Now I never want to go on any extended trips...

The worst part is when people say, "I don't know if it's dead or not..."

WHAT DO YOU MEAN‽
it's completely dead...
(The leaves looked like those of your Chinese Elm and the soil is bone dry and hardened into a single cake!)