So, hardmode.
The Wall of Flesh was... well, not a wuss as such, but yeah. Didn't warrant nearly as much preparation as I had done. Pretty much waterbolted the thing to death, without any sort of special arena setup, just fly away and let the mana flower chug potions for you. Finished it off with the Boomstick, just because using a spell from roughly midgame for the entirety of the fight felt cheap. The drop was unimpressive. Just the required hammer, and the warrior accessory.
Afterwards it was... interesting.
So, whatever pattern it is that the Hallow and Corruption (Crimson in my case) spawn, it either doesn't originate where it's supposed to, or something is tremendously weird about it. If it originates from under the map's center, then it's an "X", judging by the placement of the new Crimson segment. Which means that I'm basically SOL for Hallow, because the upper half of the Hallowed side of the X ends up in a Crimson Frost biome, which I've takes steps to isolate from the mainland beforehand. So I guess it's mass purification time.
Smashed three Altars already, thankfully a few were in memorable places nearby. Got Cobalt, Mythril, and Titanium. Neat. Cobalt armor is worse than Molten. No surprise there. I even managed to luck on a whole set of Ancient Cobalt gear in the jungle before Hardmode, and it's hardly any different.
First night was a Blood Moon, which meant that my ship was beset upon by harpies. (No "luck dragons" so far) After quickly closing all doors, the ship was hastily abandoned to prevent damage to the crew. Spent the night doing damage control on the Crimson spread, following the surface branch of the new protrusion down and leftward, separating the center "island" from the spread. Hopefully. Got about a quarter of the way through.
New enemies are... fun. Wacky, even. New weapons are likewise. Got myself a shotgun to replace the Boomstick, and a stack of explosive bullets. Damn near killed myself from trying to use it in close quarters.
So, all in all... yeah, it's going to be harder to live in the world. Once I get the Crimson under control (I'm thinking a pair of bomb-hewn Hellevators on the sides of the pattern should do the trick), we'll see about if it's more fun.