They're all nice shots in different ways. Personally I like the reworked shot a couple of posts above best.
One area you might play with is how you emphasize either the foreground or the trees to make one or the other stand out. Most of these shots give roughly half the frame to the foreground and the rest to the background which is balanced but also is a pretty normal eye level view and doesn't do much to make one or the other stand out. Something you might experiment with is trying to find positions, heights and shooting angles that either make the trees the dominant image element for instance shooting with a relatively wide angle lens from a position down low and closer to the trees but tilted up to make the trees seem even taller would emphasize their height and size. Yeah, that would also make the trees appear to tilt in towards one another unless you shoot with a tilt shift lens or do perspective correction in post but it's one way to make the trees jump out as the dominant image element.
Or take it the other way and try to find a higher perspective and tilt down to make the foreground and all that ground cover loom large with the path leading back towards the somewhat diminished forest. But one way or another I'd try to figure out what you want the viewer to really focus on and choose perspectives and framing that leads the viewer to those image elements.
There's no right or wrong and to me the images you posted speak of tranquility and balance which is fine and especially in really good light (e.g. early morning misty light in the forest) that could make a really strong image. But I'd encourage you to play around with varying perspectives, trying things from low and high positions to see what you can do to emphasize the things you really want the viewer to look at.
Similarly if this or another area that's interesting to you is close to home, visit often in varying weather conditions and varying times of day as changing light and weather can make huge differences in landscape photography. If this particular area isn't close to home then see if you can find somewhere closer to home that you can visit often to experiment with light, weather and even seasons as that can help you develop your own creative vision and figure out when the best conditions might be to visit someplace special.
Don't get me wrong, these are all nice images and well shot but as you're looking for suggestions I'd suggest mixing things up a bit and trying alternative views of common scenes and playing around with the idea of emphasizing some image elements over others to help your viewers see what you want them to see.
-Dave