Playing a World Eaters CSM fleet, and it is a lot of fun, with BOARDERS, BOARDERS FUCKING EVERYWHERE. The most epic one was a four-way between my fleet, a Tyranid fleet, an Ork WAAAGH fleet, and an Inquisitorial fleet mixed with Deathwatch.
Took forever, and had so much boarding involved, it swiftly became a running gag for the whole table. It wasn't long before just about every capital ship had its bridge smashed, weapons disabled, and shit on fire, and that was just the hit and runs. The winner was the Ork player, who somehow managed to use those fucking boarding carriers with more tactical sense than orks are supposed to have, by concentrating fire on the biggest ship available and letting their disabled engines carry them into someone else's squadrons. Also, fuck Brute Ram Ships.