Thanks to everybody for the great feedback, it's really helpful. Lots of useful insights. I do realize some of these subjects have been heavily represented by photographers past and present, so that's a valid comment (and I did ask for critiques). On the one hand, I make no apologies for shooting the subjects I enjoy shooting, and I also have no pretensions that my images are ever going to end up in a NYC gallery. On the other hand, I do feel that originality and finding my own creative vision are worthwhile goals, and that's easily the biggest challenge I struggle with in my photography. So that's definitely something I will continue to work on.
I was pretty certain the lighthouse shot in particular would get some 'overshot' comments, and I don't really disagree. I almost didn't post that image; but I did like the composition, and was pretty happy with the B&W conversion. So I was curious whether anyone else would feel that those aspects elevated the image above cliche status.
The compositional notes about the second shot are interesting to me, because I wasn't necessarily consciously aware of some of those elements when shooting. I'm not sure whether that means composition is becoming more intuitive for me, or if sometimes I just get lucky. This kind of feedback is great though, because it helps me learn more about why successful images are successful, and vice-versa.
I find the reactions to the last image most interesting.
John - to me the tension created by the tonal layers is a big part of what I liked about this image. Having been there and seen the foreground rocks in person, it never even occurred to me that there would be any ambiguity about whether the tree was growing from the foreground rocks or from behind them (it's the former), but looking at the image now I can see how that might not be clear in the web-sized version. I think there's less ambiguity when viewing it larger; I recently made a 16x24" print of this one to show some folks, and I think it works better as a large print.
oldscar - interesting that you bring up the topic of whether too much DOF can hurt the impression of depth, as I was just reading a discussion about that the other day. I do agree a subtle softening of far-away details can be a useful visual indicator of distance; although as you say it's hard to judge at this size, since pretty much everything will look sharp in a small JPEG I'll have to take another look at the print with this in mind.
Russ - I do agree that some separation between the foreground trees and the coastline behind them would have been ideal. I was limited by the location though, as this was shot from just off the highway right in Lincoln City. I think moving left or right would have meant including objects in the image that I wanted to avoid (beach houses and such). I recall quite a bit of walking back and forth and trying different heights to find a perspective that worked best. I also tried some shots from closer in with a wide-angle, but they just didn't work.
I agree with you about B&W. I'm finding I really enjoy working in monochrome, and I think my photography has improved because of it. For just about anything but color theory, I think B&W is probably a better learning tool, because as you say color can mask underlying factors in an image.