On the other hand, have you ever been able to just "lose yourself" while doing something that you really don’t love to do?
I can think of many things: accounts, billing, actually anything to do with numbers, sorting socks after laundry and a whole host of other things.
I do not enjoy of any of the tasks above but I find that when I stop running from them, just "settle in" and do what needs to be done, I can actually enjoy it. Of course I do not think that "I wish I could do this every day!" but I can, when I single task, enjoy the process.
So it appears that it is not ALL or ONLY about doing what you love. If we can pay attention and single task, we may find ourselves getting into flow even whilst doing tasks that we do not particularly enjoy.