I saw a thread on a forum asking if you would play an MMO which only had raiding. My immediate answer was "No".
Now, I like raiding. But for me, raiding has too intense a pace to sustain long hours. It's good to raid a couple nights a week. But I like having a wide variety of activities with different intensities. Sometimes you just want to log on and do something that doesn't require a lot of thought.
Thinking back on it, I believe this is where Wildstar went wrong for me. The base of level of intensity required for normal questing was just too high. Killing a regular mob required a lot of running around and dodging telegraphs. I don't mind jumping up to that level every so often, like say a dungeon. But having that being the standard gameplay was very tiring.
In fact, I think this is a problem with "action combat" games in general. They dial up the action a bit too much, and that ends up tiring out a lot of the players. In contrast, tab-target games usually start from a lower baseline, and ramp up the intensity for specific moments or specific fights.
Interestingly enough, if you look at Tera, even though it's action combat, the baseline pacing is actually rather slow.
You often see calls for the developers to make activities like fishing more interesting or more active. But perhaps the allure of fishing for a lot of people is precisely the fact that it's not very intense or very active. It's a good activity for times when you just want to do something that doesn't require a lot of effort.
For me, I would say that FFXIV has my ideal baseline intensity. It's a bit slower than WoW, especially modern WoW which is rather faster than Vanilla was. Admittedly, paladins used to only have 2 actions every 15 seconds or so (Judge/Seal), which was way too relaxed.
What game represents your ideal baseline intensity?