You can cover a lot more bases than you'd expect with commons but the one thing they never print at common is duals that don't come into play tapped. This means aggro decks generally have to by monocolor while midrange and control can afford two colors or three if they're willing to push it.
So let's talk about Pauper decks
Mono-Green Stompy
These decks hearken back to the old Señor Stompy decks. It plays a bunch of cheap creatures and pump spells and has a mana curve that's practically flat. It has the classic issue of the mono green deck where doesn't have reach for if the game goes late, but if they stumble they're gonna get run over.
If your into aggro but not so into green there are other options, Mono-Red aggro with Foundry Street Denizin, Burn, Affinity, or even Mono-White Heroic. If you're into grindy midrange well then there's.
Boros-Metalcraft
Prophetic Prism's turn the drawbacks of cards like Glint Hawk or Kor Skyfisher into advantages by letting you pick them up and play them again. Combine that with the extra cards you draw by being anointed by Palace Sentinels you should eventually bury your opponent in card advantage.
If instead you long for the days of onslaught/theros standard there's still a competitive mono-black midrange control deck though it seems to be on the outs. If you'd like to go even durdlier the is of course tron
Tron
We all know what's going on here, play tron lands make a asslode of mana and go over the top of whatever they're doing. Generally the game ends by Crusher beats or one big Rolling Thunder or occasionally by ten hits from a Mulldrifter.
Personally I find the Blue/Black control lists more interesting. Many of them have started to run Striped Riverwinder alongside exume to give the option to steal games by reanimating a hexproof beater on turn 2. Of course if you really want to steal games what you want is a combo deck. Sadly combo has proven a little too good in pauper and the once might storm a flicker decks have seen the ban list for power level reasons. A few still remain of course including
Tireless Tribe
Tireless tribe can pump it's own toughness and Inside Out turns that toughness into power to end the game potentially as early as turn two. Of course even with blue card filtering and countermagic the combo is still worryingly fragile and hard to assemble.
Of course if you really want to win you'd probally want to go with the most powerful and popular deck in the format.
Delver
Delver a top deck in every format with the cantrips to support it and Pauper has all the cantrips. It has aggressive lines of play where it sticks the early delver and rides it to victory as well the lines where it sits behind countermagic. It has a lot of cool synergies like Ninja being able to pick up a Spellstutter Sprite so you can use it again. While there are mono-blue versions of delver more popular are the ones the splash red for Lightning Bolt and Skred, the fact that you play Ash Barrens and Evolving Wilds even has the upside of making Brainstorm and Ponder better by letting shuffle away unwanted cards.
