Which needs based reward trait would you choose for yourself?

Forever fresh.

I'm already super-energetic, as well as a pretty much a self-reliant, introverted lone wolf (need no one) and have a natural "steel" bladder.

I like both eating and having showers, but eating is more fun, and I can do while doing other activities (such as working or reading or being outdoors) while showering/getting clean is something I can't really do in multitasking mode.

So my choice is Forever fresh - so I can use the time I'd spend cleaning myself doing other, more productive or enjoyable stuff.