Been a while since I've posted anything here.
I've kind of shifted away from using Myrs (even though my Myr deck is one of my main decks) and have picked up Artifact Affinity instead-- and my deck is more or less as good as it is going to get without me dropping capital-M Money on Arcbound Ravagers, Steel Overseers, Mox Opals, and Inkmoth/Blinkmoth Nexus cards. And so far it's been treating me pretty well! I ended up in 13th out of 31 last FNM, which is really high for me-- and out of four rounds, I went 1/2, 2/1, 1/2, and 2/0-- and most of my losses were very close games.
The deck is pretty standard as far as affinity goes though:
4 Memnite
4 Ornithopter
4 Vault Skirge
4 Signal Pest
4 Etched Champion
3 Frogmite
2 Myr Enforcer
1 Lodestone Myr
4 Cranial Plating
4 Tempered Steel
3 Springleaf Drum
3 Thoughtcast
2 Ensoul Artifact
4 Seachrome Coast
4 Darksteel Citadel
4 Ghost Quarter
3 Island
3 Plains
Simple, straightforward, and fast as hell. Getting a Vault Skirge with Ensoul Artifact all set on turn 2 is the best feeling. It's also fun to use Ghost Quarter, especially against people who run really complex land setups, because they don't know if I'm going to use it to remove their lands or target myself so I can quickly grab an Island for Ensoul Artifact/Thoughtcast or a Plains for Tempered Steel. I can target Darksteel Citadel for a free tradeoff in my own case, since it cannot be destroyed. So much fun.
I also picked up the Blessed vs. Cursed deck sets, and I'm thinking it may be fun to run a Zombie deck sometime. The Cursed deck looks fun, but needs a lot of modification, I feel.