For the first 8 months of my LO's life she would fight sleep. Now.... she loves it!
For nap time usually I will ask her if she's ready for nap, and will say "yeah," and walk right over to me so I can put her in her crib, no questions or fights about it. But sometimes she'll look tired, lay down on the floor, or walk over to her crib so I'll ask if she wants to nap early, and she'll say, "yeah." and I let her.
Last night was the first time LO did this with bed time too. We were all playing in her room and she tried to put her doll in her crib so I asked if her doll was sleepy and wanted to go night night. She said no, and tried to climb in the crib herself. I asked if she wanted to go night night, and she said yeah. So I let her go to bed a little early.
I'm feeling very blessed right now that we don't have to fight at nap and bed time!