Whenever you tell someone they "should" do something you put a burden on them. It makes them try to want to want. A pure desire isn't motivated by mustered up passion. It is motivated by God's love. When we feel unworthy, scared, lazy, or indifferent God would love it if we came to Him and said, "Lord I can't change how I feel. Reveal to me how you are loving me in this moment and in this day. I know your love will change me."
We put so many shoulds on ourselves that we feel bad or selfish if we don't just get out there and do things for God. The fact is we always please God. We please Him even more by allowing Him to please us by showing us His affection for us. Nothing changes us more effectively than that. We love because He first loved us. Should says, "If you don't or can't you are bad." God as love says, "I'm good so you can."
Those who would call this is too mushy speak from their own pride. They are the type that say, "Just give me an order & I can do it!" True love is only produced by recognizing God's love. Obedience cannot produce love but love produces obedience. Mutual affection is the root of our cooperation with God.