Been playing World of Tanks for the past month. I remember seeing an advert for it years ago and I ignored it, expecting it to be another browser-based flash game or something. This was, of course, an incorrect assumption. Oh well!
Just unlocked the KV-2. I thought after using the 122mm U-11 howitzer on the KV-1 that I'd be ready, but the KV-2 with the 152mm M-10 is still a really difficult vehicle to handle (just like in reality; as the in-game description says, most were lost in the same year they were deployed). It's epic compared to anything in lower tiers though, being monstrously unwieldy but having an obscene damage potential after its 20+ second reload. A 'lethal joke character' to be sure, or an absolute menace in the hands of a particularly good player, but still incredibly fun whatever the means and result.
Otherwise, my main would be the Churchill I. Seems to suit me; just a shame the upgraded turret has much thinner armour, while the unupgraded turret can only mount weapons that are useless at the tank's tier. They need to buff the damage on that OQF 3" howitzer (and give it a large-calibre firing sound!).