I like the Crystal Tower raids better then the HW raids. More varied design, more impressive looking bosses, more interesting looking gear drops, etc. The visual design of everything about them is spot on and I'm always impressed when I run them.
Void Ark is easily the most boring raid as the dungeon design and boss design never varies throughout (Goth) and I find the equips don't feel different enough for me to warrant collecting them (Goth... again). I pretty much just run it whenever I need Machi Pennies and that's it. This is definetly the dungeon that feels the longest to finish.
Weeping City is slightly better as there's a nice visual build-up to the Ozma fight and the gear design varies between classes a tad more. The Machi Matter reward helps a lot too.
Updates
Finally got the Hyperconductive Astro's weapon. So pretty.
Half-way to the iLvl 240 Anima SUM weapon. I also now have a pretty steady supply of items to trade for Crystal Sand so I should have the weapon finished by the time patch 3.45 comes out.
Caved and got the Far East optional items. 'Cause this game has a lack of "Yes, I'm hot; no, I don't have to prove it by being half-naked" outfits. It also looked familiar and I realized that it's most likely based off of Lenna's Monk outfit from FFV.
Got 500 player commendations and am stomping around Eorzea in Gilded Magitech Armor.
Starting farming HW Primals. Got the Bismark bird right away, but Ravana's is taking longer. On the other hand, it's pretty fun figuring out when to time Dreadwyrm trance on Ravana so that Deathflare can crit for 15k damage without Foe Requiem...