UK (I am British Citizen, non resident) because it is a more free country.
- No taxation except on UK property capital gains or rent when non resident.
- No invasive surveillance (privacy rights) when non resident.
- Health Care if return (free). *subject to paying in NI.
- Social Security if return (free). *subject to paying in NI.
- Fair taxes if in the UK as a Resident.
- Fair taxes if in the UK as a non-dom (main abode somewhere else).
- Money in Politics is less.
- UK is a land of opportunity, we don't care about someones education, or lineage, colour, creed.
- Some of the finest people in the world.
* if the UK introduces the taxation/surveillance the US has for non residents, i'd probably obtain citizenship elsewhere and drop the UK citizenship immediately -> UK Gov recognises this so doesn't appear to be interested in following the US Approach.