PSA: I switched from a Nexus 4. That’s the context any comparisons I implicitly make will be in relation to.
The Nexus 5 feels better to hold and touch, it’s lighter, the screen is a vivid, beautiful piece of glass to look at, everything is faster, transitions and scrolling smoother, the camera’s better (especially in low-light), the LTE is welcome, the battery gives me a day.