The pre-game/training kit looks very nice. I can see why the Nigeria kit has had a lot of positive attention though, although it's a bit too out there for me. Maybe if I was 16-21 it would appeal.
In regards to wearing other clubs or nations kits, I'm one of those who has a bit of a collection. Obviously I wouldn't buy a shirt of another English club or one of the home nations, but in my collection are AC Milan, Real Madrid, PSG, Barca, Belgium, Roma, Croatia, Holland, Brazil, Hamburg, Ajax etc. If I ever go abroad and go on a stadium tour (Barca and Ajax) I find myself buying a shirt for some stupid reason. Tend to wear them for midweek football or just casually on a lazy day.