Warhammer 40k is among the best hobbies I've seen. Its sheer amount of details such as its fluff, rules and all the model preparation hours you spend are nothing less than awesome.
Strategy should play an important role, of course, and it makes sense! You dedicate a lot to the game. There's financial investments and time going around the assembling, painting (very important, kids!) and all of the 'putting together' aspects that makes you feel compelled to deliver a good game, that at least will...