Uneasy is the word I'd use as well. And in saying this I have to be honest and admit that I can't point to anything specific that's
wrong.
Hillsong often get the plaudits (and the rap), but there are other similar movements. Worship Central and HTB here in the UK spring immediately to mind. I do go to these kinds of places from time to time and, whatever the organisation, you talk to the people involved: they're approachable and seem genuine, and they talk about empowering and benefitting the church and Christians at large, and I have no evidence to the contrary. All of which just leaves me feeling guilty about my discomfort, and maybe that's OK because maybe I'm wrong.
On the flip-side everything is so shiny: everyone you see ministering is beautiful and/or handsome and, although the quality of the music and lyrics might be questionable, the production values are excruciatingly high, and you're surrounded by people - particularly at the front - who appear to be going out of their way to model this kind of aching hyperreal trendiness.
Compare this with the composition of the average congregation (of any denomination) in the UK[1]. Even stepping past the issue of ageing congregations in many places, we're (and I mean no unkindness in saying this) a pretty miscellaneous bunch. In lots of churches you end up with all sorts having to get involved in making it work, not just those who are good-looking or loaded or "good people". There's space for everyone, and all can contribute, or at least that's what we aspire to - we believe in a God who calls the things who are not as though they are.
Possibly that last observation is rose-tinted when compared with reality, and possibly unfair on Hillsong and its imitators. Still, the contrast between Hillsong-like and most other churches does feel jarring and leaves me with that lingering unease.
Sorry: this ended up a lot longer than I expected.
[1] Note that I deliberately haven't gone down the route of comparing with the lives and lifestyles of Jesus and the Apostles, not because I necessarily think the comparison is invalid, but because: one, for many people I think there's a lack of familiarity with the source material that may render the comparison meaningless to them, and, two, because the societal and cultural situations are radically different, which makes any such comparison much more complex.