I like each equally for different reasons
I don't mean to come off as indecisive. However, I do like various tournament formats (i.e. 6-Max and Heads-Up) of No-Limit Texas Hold'em, as well as PLO and Omaha Hi/Lo, with a greater affinity for PLO.
On the basis of having to like a variant of poker better, I like Omaha. This is because of what other people said: 4 cards to start instead of 2. However, this means that even with speculative 4-card holdings, pre-flop equities tend to hover in the 40% range in the very least, it seems, while your stronger
hands tend to hover only around the low 60% range pre-flop. This basically means anything can happen with your hand on any street because of the combos of your hand range, which makes it super exciting. This variability, though it increases the variance of each hand, is why I love studying and playing PLO far more than basic white chicks love sipping Pumpkin Spice Lattes in the fall. That's just to give you an idea.
Whereas lots of hands like AA and KK hold up between 75-80% of the time in Texas Hold'em, PLO hands containing AA and KK can often lose depending on board textures, especially against well connected hands, even as low as J-T-9-8 single or double-suited, for example. Therefore, I like going into PLO with the mindset that my starting hand is a raw ingredient to be used to make the best recipe of a hand for the most +EV result.
While I love NLHE in many formats for different reasons, the simplicity of it bores the hell out of me, especially since it seems like everyone who plays on any level from amateur to fully-fledged pro plays just no-limit.