Hope you like being the underdogs. And having jack-shit for Str 9+ weaponry outside of a Nob charging with a PK. They're painfully limited on 'dakka' that involves anything above the strength of an Autocannon, as all their Str 8 is 1-shot, and their Zzap Guns (what would be their Anti-Tank) are ridiculously overpriced and worthless 63% of the time for the role they were intended for. Plus they are not an army that gets much in the way of unit customization or options. Meaning you field -x- unit and unless it's a battlewagon or Nob mob, your options basically amount to what size you field them at, and whether you take a Nob with a PK or a Nob with a PK (because there is no other worthwhile weapon for your Nob leaders).
That said, the army can be fun to play, provided your opponents aren't try-hard fucks who list-tailor their army each game. And IA8 does a lot to help the Orks out and make the game more enjoyable, as well. Just remember "boyz before toys", "Shootas > Choppa/Sluggas", and "Never field Warpheads, Weirdboyz, Zzap Guns, Flash-Gitz, Stikkbombs, 'Uge Choppas (except in Nob Mobs), Stormboyz, or DeffDreads as anything other than a troop-choice. And generally speaking, Looted Wagons are really only useful if you can't use Imperial Armor 8, or you don't have the points for a real Heavy Support vehicle (*cough* Battlewagon).