Most of the time it's just like first person real life. But you'll find that out for yourself when you LD An awesome goal that's fun even after you've been Lding for a long time is just exploring the environment. Feel the walls, the ground, stare at your hands until you can see every wrinkle. Lick the windows. Smell, taste, etc. The more frequently you do that in a LD, the more vivid (and stable) the dream will become.

As long as you've got good basic recall, lucid dreams tend to be way easier to remember than regular dreams.