Xenoblade X is worth it just for the giant flying robots.
There's tons of great things in it. Combat is great, characters are fun (not great or anything, just fun), music is top tier, the world is great, creative and beautiful. The plot is lacking, but the game empathizes more on worldbuilding, some of the sidequests are fantastic. The game is massive. It boasts 19 playable characters and 12 weapons (split by melee and guns). For Cross, you choose one melee and one gun, giving you tons of possible combinations. Each other character has a set melee and gun, fixing their "class." The Skells give combat variety, and there's seven types of them. The world is massive and full of secrets, specially ridiculously OP bosses. As you progress through the game new alien species move into the city, and some of them are fantastic. The game can get super dark in certain sidequests, while also having lighthearted and fun moments. There's tons more I loved about this game, but this got longer than I intended.
X is one of the best games I've ever played and I highly recommend it, but I might be a bit biased because it's Xenoblade.