Personally I've found I automatically play differently depending on how much ammo I carry. Certainly in the early days when I'd have a couple of 300 round maracas, I'd use weight of fire a lot. Moving to mid caps meant I had to put a some thought into ammo conservation, and the issue of timing reloads came into play. For about the last 9 years I've used mostly GBBR's and whilst it's a huge disadvantage in terms of ammo capacity, I find it much more satisfying. Having <40 rounds per mag makes me much more careful with my trigger finger.
End of the day, running high, mid or even low caps are great fun in different ways. We can all give our opinions, but you'll find what works best for you and then down the line you'll change your mind.