I've just had my second boy, and although I really didn't mind what I had, I was slightly relieved to have another DS as I know where I am with boys!
I think I have a very stereotypical boy in DS1 (who's 2). He is very physical. very boisterous and completely needs to be worn out from morning till night. He loves trains and cars (though we haven't really encouraged this), climbing, jumping, has no sense or fear, and is very loving. He also eats like a horse.
I did have to buy him a baby stroller to push as he kept stealing little girls prams in the park!
But, most of the babies and children I know are boys and they are all very different with unique personalities. I have one of the most "boyish" boys.
I'm not looking forward to the sunday mornings I'm going to have to spend on the side of a field, but then I also hate the idea of having to stop a stroppy 9 year old from demanding they have their ears pierced and wear make up, so it's swings and roundabouts I suppose.
And, although it is annoying that the selection of boys clothes is much smaller than those for girls, I really don't like pink and frilly at all. Yes there are more girls clothes, but they are just mini versions of womans clothes that are actually not that nice and a bit inappropriate at times. I agree that H&M is a great place to buy stuff. Cheap and cool, what more can you want?!
OP, you will love it!