It's more than just personal preference. There are environments that make it easier to get some kind of physical activity, and others that make it very hard.
Weather, proximity to parks/recreational areas, convenient public transit, and dense neighborhoods can contribute to increasing physical activity without someone actually wanting to "like being active".
There are local/regional/national differences in physical activity and health that are not merely explained by personal preference.
Is an active lifestyle easy? Well, it is easy if you like being active, and extremely hard if you hate it.