Seeing as my Apple Watch Sport was a gift from my dad for Christmas, I was worried that it'd be tiny on me, I even asked him if he's got a receipt so I could exchange it for the bigger 42 model and pay the difference lol.
But after wearing it from then til now, it's grown on me, it's actually an alright size on me, but I do think that with the Apple Watch 2, I'll probably go for the 42 (though I think it's best if I try one on first before really settling for that model)