Isn't it nice to be appreciated? Don't you feel good vibes toward someone who thanks you for your being and doing? My husband cooks all our meals with loving care--he is devoted to the art and craft of cooking, and I can't imagine not thanking him for his efforts.
As reported earlier, I've done full-time temporary tax work for the same person for seven years. Never once in all that time have I heard a "thank you," "good job," or anything similar. Yes, I've been paid well, but I have certainly learned to work well without any show of gratitude. I do my best because that's my nature. It's a good thing I didn't need the boss' appreciation to motivate me. Being Miss-Manners-trained, I said "thank you" multiple times a day to my boss, because I couldn't do the job without his help. Pay and instruction (i.e., correction) were his expressions of gratitude.
Not receiving enough gratitude in your life? Give it out! What goes around comes around.