I use the "love languages" techniques to motivate my children AND my students (I am a teacher). It works WONDERS!! I too could never understand the "gift giver" as I never appreciated the gifts, but I did appreciate it when someone helped me. Thus, my number one love language is "acts of service". My former spouse would always "give" me things, so his number one love language was "receiving gifts" (his number two was "words of affirmation).
Knowing your love language, and that of your spouse, helps to make a relationship "work" but only if both parties have at least an average emotional intelligence level. Nothing can make up for a below average emotional intelligence, even practicing the "love languages".