LucasArts all the way
And this is pure nostalgia talking out of me. Monkey Island and Indiana Jones series definitely bring back the best time of my childhood, and playing those games was simply marvelous. Sierra games were too complex in a way. I don't think I've finished any of their text-command adventures, except one Space Quest sequel. My english wasn't good enough, and walking around pointlessly trying out hundreds of text action-place combinations was too frustrating. On the other hand, Monkey Islands, Indiana Jones, Sam & Max, DOTT and similar had an unbeatable atmosphere, and a truly unique and witty sense of humor that I adored. I immersed myself into those games completely and finished them dozens of times. I can never get enough
Sorry, got carried away a little