I usually really like big Astartes walkers which are what if basically dude in power armor but now with even bigger power armor.
However I am LOSING IT at the engraved groin plate on the Grey Knights Nemesis Dreadknight. It looks like a Holy Diaper! You’re being attacked by an Assault Babyfur! “Perfidus purgator! Brother Ezekiah, we are surrounded by Tyrannids and I need a nap and want my blankie!”