G'day Mitch,
Welcome and congrats on the new toy
I like the way you've "seen" the scenes in your first series you posted, good stuff. Good seperation of your subject from the backgrounds which makes for good strong subjects that stand out in the images...
In the second series, the shots of the prado(?) may have needed a faster shutter as Raskill mentioned, if you're struggling with shutter speed you can always bump up the ISO (digital's great!) to help with that...
The dynamic range between shadow and highlights in the creek shot would be difficult to capture when the sun's so high (I think it was taken at 1:10pm?), with "foresty" stuff like that, the early (or late) soft light is your best mate
Everyone thinks differently and appreciates different things in images, but I reckon landscape stuff benefits from something that the eye can start with that's interesting in the foreground, and then the viewer can roam around in the middle and background of the image... Maybe stopping down to a smaller aperture (larger number) will also increase your depth of field too, that is if that's what you want of course...
Post processing with apps like photoshop (or Paint Shop Pro etc.) will help you extract the best from your images too... Have a sticky nose through some of the galleries of the members here, there are heaps of examples from a D70 in member's web sites/galleries etc... All sorts of
styles etc...
The D70 is a great camera and you'll enjoy it... Good stuff mate, keep postin' it's all good...