Krenko, Mob Boss, Zada, Hedron Grinder, and a few others on this list are very popular commanders online, as goblins is one of the best supported types in all of MTG
Demonic Counsel feels like the best Duskmourn card spoiled so far because its fail case is finding a Demon creature - so building a deck to make that desirable means it will never be "bad," but with Delirium it is a 2 mana spell that finds any answer or threat a player needs
You can set up excellent value engines with a sacrifice outlet and ETB zombies like Diregraf Colossus and Gray Merchant of Asphodel
I can likely get rid of half my tokens, if not more, and downsizing my token box is definitely something I should spend more time on
And naturally, since artifacts are mostly colorless cards, and include some of the biggest design mistakes in Magic, they tend to produce infinite combos quite easily