Hardest character to write?

I recently bought a calligraphy board and even though I kinda suck I want to challenge myself. I want to know what you think are hard characters to write that aren't just really big like 麤 or 壘, but are really hard to get to look right. Some that come to mind are 第, 蜘, 麗, and 來, all of which have curved lines that are so easy to screw up. Additionally, 車, 専, and 樂 are awkward to write in simplified because of their blank space and diagonal strokes, but I prefer to use traditional.