When I was a kid growing up - long, long before video games were conceived in any form outside a lab - we used to talk to our dads and granddads about "the war" and had HO scale Airfix model tanks and planes and soldiers we'd play with in the sand lots and alleys and parent's family rooms in winter... I always loved tanks; the brutish, clanking, hulking, terrible mechanical beauty of them, so when I first heard about WoT I jumped on board... I did the open beta and over the past six years have logged 50,000+ battles in the game. It's really all I've played save a couple run throughs of MGSIV and The Last of Us in years... I save huge amounts of money because it's practically the only gaming I pursue regularly anymore, so rather than spending a few hundred a month on games and systems and whatever, I might throw Wargaming $200 in a year... and my obsession with it just keeps on keeping on... Occasionally I'll think, "there's no end game to this... why bother? I should play something else..." but a couple days later I'm back in for a handful of battles... I just love it...
It's not a casual friendly game though, and the learning curve - though easier than it was five years ago - can still be pretty brutal... unlike most games, it gets harder to be useful to your team as you advance in tiers, because bigger badder tanks face bigger badder tanks with better drivers! So a new kid who buys the biggest, baddest tank in the store is going to be lunch meat to players with 20,000 games under their belt driving a vehicle two tiers lower on the tech tree... And the three tier spread means that once your out of the beginner levels, you habitually face tanks two tiers better than yours, again with much better drivers and crews and equipment; you definitely have to persist to succeed in this game...
But ya, if you love tanks, this is the only game in town, and it's a damned good one.