All the behavior you're seeing is totally normal. Some kids wake up smiley and happy, others wake up cranky and needy. My first was like that- I always knew she was awake because she would immediately start crying. She's 7 now and still hates getting up in the morning!
It's totally normal for a toddler to sometimes want nothing to do with one parent or the other. They often switch back and forth- first mommy is the favorite, then it's daddy for a while, then it's mommy again... If the toddler is nursing, then nursing is going to be part of that preference, particularly during transitions from sleeping to waking or from being in daycare to being at home. Unless you plan on weaning really soon, there's no reason to worry about what weaning will mean for those transitions in the future. Your child will eventually and gradually reduce his reliance on nursing to get him through transition points. Roll with it for now, and it will fade away.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"