I've been at the beach many times at the end of the day and people congregate to watch the upcoming sunset. I always think how nice it is that people still care and that they are out there for "that special moment"...so I think the people are great on here, along with the feeling of everything else. Its a lovely photo.
The water is weird!! :) This is no critique of your photo-skills, just a strange phenomenon. Maybe its just me, but it looks like its not a calm sea stretching for miles, but a big wave of water rising up. I dunno why its like this, though.
Anyway, really nice pic! I agree with the others, next time chase away the people, and tell that one bird to the left to stay with his mates! :)