I like to experiment with Funky lists.
Lists that make no sense at all. All in the name of testing out various things/units/combos etc.
A lot of people netlists or draw on what others have to say in forums.
But I prefer to use the units in actual battles a few times to see how they perform under pressure from my regular opponents and how they perform under my rolling. Actually, I am so used to losing with my Dark Elves that I don't mind losing more battles.
People keep saying that Dark Elves is such a powerful army etc etc. I've won my share of battles under 7th Ed, and lost my share of battles under 7th Ed also. But Dark Elves wasn't the kind of army that can powerthrough opponents just by being there. My 7th Ed DE Cold One Knights Death Star list was fierce though not unbeatable.
I liked to play my O&G army too in the past , though I never play to win, mostly fielding a Goblin army. They provided a lot of laughs, both by blowing up spectacularly or bringing down a Dragon on the charge.
I struggle eternally against the BeardyOne's Dwarves. His Ogre Kingdoms surprised me, but I think I managed better against him after the initial surprise. I struggle against High Elves, having two good High Elf players in my group. I tend to have better luck against YC, but he tends to play funky armies like Skaven or Wood Elves. Battles against his Vampires tend to go 50/50. His dice-rolling is also legendary (poor).
I remember going up against SilverHelm lists, having to dodge Comet of Cassandras, and getting my 30-elf Executioners chewed up by a Gyrocopter (7th Ed). I remember a battle against Defu where he brought 8 chariots which out-ranged mine, and I got chewed up by his impact hits.
I have never broken the BeardyOne's dwarven infantry blocks, though I did once manage to eat all his warmachines and ranged infantry. I have never beaten Slann or High Elf or Dwarf, though I have drawn against the rest.
Tomorrow, I am going up against Tomb Kings and probably Ogres again with a new funky list.