I also have 3440x1440 curved at home and flat at work. My personal recommendation is to get a curved one. But if I have to shop now for a monitor, I will simply get a 4K flat. 32-34 inches. The lost vertical space is a real deal breaker for me and it annoys me.

Ultra wide are nice for example for audio/video editing, where you want to visualise the timeline, but majority of tasks you would do, including gaming on them are better on a standard 16:9 monitors.