Hi Christina,
Some very pleasant scenery and love the reflections in that still water;
No 1, - I think needs a smidgin more sky at the top, easily cloned I suspect and the slight clockwise rotation. There appears to me to be a bit of distortion with the outer trees appearing to be leaning out towards the edges especially when compared to No 2.
No 2, - As Frank has mentioned the rails would have been better to the right but that may not have been an option. Is there any way that the bright area of the sky at the 'V' could be toned down? Good foreground sharpness here, it may be worthwhile noting how/where you focussed for future reference.
No 3, - Would it be worth considering cropping half of the water (between tree tip and bottom), just seems to improve it to me.
No 4, - For some reason, as with No 3 I find that it's too central vertically and would be improved with either more sky or water.
As for a 'preferred' image I'll go for No 1 but followed extremely closely by 4
Grahame