Welcome to Librarium Online!
Back in the day when I used to play M:tG I would play afew serious decks and afew fun casual decks based around stupid combos that would very rarely work but were great fun to play. Do many people run their warhammer armies with this as a central theme? More and more I see people building armies (40k only, dont play fantasy) for power gaming or to combat such lists (Nidzilla and Biker Nobs come to mind).
My fun list essentially is pedro w/ sternguard dropping mid feild and having jump chaplain w/ assault squad run up. Gets horribly wrecked by anything competative but always fun.
Post your fun list/tactics/ideas
9 penitent engines and Karamazov in a big line across the table.
Backed up by small units of arbites escorting much larger units of zealots and priests.
Repentia, arcos, death cult, temple assasin, etc optional.