Although I'm currently playing FF
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Although I'm currently playing FF I don't see any reason not to WOW Classic TBC Gold play ESO. Both are extremely enjoyable with their own distinct ways. Final Fantasy strikes me as more of an interactive game and its story is on par with any main line Final Fantasy game. However, I think ESO let's you become way more immersed in the world. If you're aware of your Nirn to be a bit of a geek, ESO will give you so many ways to be part of it. The biggest issue for many appears to be combat. FF appears to be more like WoW. ESO is closer to GW2 and the later moves in ESO seem somewhat ridiculous, not from a length but from an execution standpoint.
Both are extremely beneficial and can be used to help fill various niches. I've personally liked ESO's story more, but I've played more Elder Scrolls games than I have Final Fantasy games, so I know the lore and references far more frequently in ESO.
ESO has a more slick housing system than FFXIV. It allows you to cheap WOW TBC Classic Gold tilt and float objects without exploiting bugs, if nothing else. Plus since it's all instanced(but huge) it's not necessary to argue over plots.