Got my 42mm Apple Watch today, and the first thing I did was put it side-by-side next to my Motorola Moto 360 Android watch. The 42mm actually seems a bit smaller than the Moto 360, but I don’t really mind. I think the Apple Watch is a bit more polished, and just looks better.
If there was any doubt that the 42mm might be too big (compared to the 38mm), that doubt is now gone. 42mm is not big. Feels “just right”.