My son is 23 months and absolutely the same. The one that always gets me is church, I'll see kids his age sitting in the pew calmly eating cheerios or reading a book or letting their parents hold them during the entire service - no way. Not my son. He's not naughty, he's actually a very sweet boy, but there is no way he could sit through a Royals game either. Besides just not being able to sit still, he'd be up past his bedtime, off routine, over-stimulated, told "no" a few too many times and he'd have an incredible melt-down. He's always been like this and now I think my little girl is the same. I went to lunch with a friend who had a baby who was 7 months old and sat on her lap like an angel the entire meal. Ha. Not my little girl either - she'd be squirming all over me :)
My dad tells me I was like this as a child, as were my brothers, we all turned out okay.
We did go camping this weekend and I don't think my son has ever had so much fun. With camping, you don't need to sit down - even to eat your hot dogs!! We had a great time watching him explore, run, fall down over and over and actually not have to worry about it.
Rambunctious kids are probably just that - rambunctious kids. If he was calm and mellow, he'd be boring :)