I agree that subjective opinion is subjective - just read the bit in red if you want to know what I'm trying to get at.
Now, I assume this will become a flame war, but this is a serious question. I used to play WoW for years, but then tried Rift and fell head over heels for it. In the past, I used to take breaks from WoW, now the MoP expansion hardly stirred any emotion. I now take the occasional break from Rift and I anxiously await Storm Legion.
I took a break briefly prior to the "Water" event patch and came back to find a very different, better game. If you leave for a month or two, you can bet your butt that you will come back to a LOT of new content.
While Rift does not have ranked PvP or Arena (oh, and the pet battles - which I am sure we will see soon if enough want it), in my personal opinion, it exceeds every other aspect of WoW and has many new features.
It shamelessly copies the best features from other games and improves their own customer experience. For example - multiple loot was just taken from GW2 and put in. AoE loot I think was it's idea. Selling grey items to vendor with a click, auto-loot of gold from mobs. Daily Raids from TBC.
The release version was relatively bug free and the game now at version 1.11 makes 1.0 release look like a completely different game. The number of improvements, content added is amazing. Now, version 2.0 has tripled the size of the world and I am like a kid at Christmas waiting to see it.
I truly, sincerely cannot fathom the popularity of WoW. Have any of you tried the trial and seen how 1.11 looks, how much there is to do?
The lore in WoW is not any better than the whole "dragon" / elements saga in Rift, so I don't get it. Graphics are better, in my opinion (I have a decent PC), so what is it, guys? Seriously?
EDIT: I do, of course, agree with the "If it's fun, why stop playing?". I guess I didn't convey myself correctly. I am just puzzled as to what "Rift" lacks that "WoW" has ? I guess my intent was to find the "x" factor as I see a development team that pops out content every 6~8 weeks and an attitude (in the last expansion) of indifference from the Blizzard team. I used to have 9 (4xUS, 5xEU) WoW accounts, but switched as I saw a (in my opinion) a better game with a more active development team. So I had to wonder about everyone else. What is the "x" factor?