Don't feel too bad about the tilt thing. It's pretty common for them to be at least a little off. I'm adjusting mine all the time, even when the tilt is intentional. After a while of doing this, you'll get more of an adapted sense of it and be able to spot it quickly, even without any obvious point of reference.
Ah, ok on the driftwood. And yeah, just a bit more detail would help. Lesson learned and you said you're shooting raw now, so... all the better.
On the scale/bigger image thing... that occurred to me when I was commenting before, and yeah... maybe. The problem is if the image NEEDS to be giant to work, I feel like that's a problem. Two things to consider here, I think...
1. Often times we initially want EVERYTHING in the picture, when in truth we can get what we need to convey the feeling with far less of what we have originally captured. Early on in most photographer's careers, cropping is almost always needed and almost always strengthens the image. To some degree, I think that is the case with this one.
2. And here's why the "to some degree"... to be honest, NONE of the boats in the image are laid out in a way that does a great job for the image. They're all facing away from the lens, and not terribly interesting from behind. Even when you try cropping in to maintain just one in the frame, it just doesn't work that well. In short... you had a good eye for an interesting scene, but the elements in the scene were out of your control and didn't line up in a way that really worked.
So... still a cool image, but not a real bell-ringer, if you know what I mean.