I actually feel the same way as gibbson913 on having multiple computers, although I wouldn't say I "hate" it, just not preferred. And again, my preference is the same here with using an iPad instead of a Mac for portability.
The last time I had two Macs was when I had a 2010 MacBook Air plus an iMac but I only kept the Air for about a year before handing it over to my wife. The problem back then was that all we had was MobileMe, so I personally found it irritating not having all of my data and media synced up seamlessly. It was unnecessary upkeep for me. However now since that iCloud has merged pretty much all your data, i would be more open to the idea of having a second Mac.
But at the same time I really find an iOS device a joy to use because of how smaller and lighter it is, both in terms of physical size and weight, and also on my wallet. I myself don't do any serious work on the go but it is certainly capable of doing enough work to make me happy and justified. And for me I'm finding it harder to justify owning a secondary portable Mac when we are starting to get new iPad Pros that are having greater performance than before.
But I will say that having a second Mac today is much simpler and better than it was before. It's just that there are more mobile options now than in 2010.