As an SWL and monitor with a history of ham monitoring and DXing (listening only) I can assure you that hearing hams from all over the world is still doable in northern latitudes.
If you're in the NW US, you'll get a bit less of the auroral oval than you'll get farther east (it seems to dip lower in the Midwest than it does here in the NW) -- the drawback being that you'll be a bit farther from Europe, even via the great circle. I've heard hams from the US, South America, Asia, Europe and the Middle East. I used to hear KC4AAA transmitting from Antarctica -- but that was a few years ago, obviously. I heard Finland around Christmas about 4-5 years ago.
In my QTH Africa has been difficult -- but then I only have used random and long wire antennas, and I'm in a hole. I've heard broadcasts from Africa, so I know that Africa is doable from a northern latitude.
The main drawback to northern latitudes I think is during poor overall conditions -- like right now, when the sunspots are down -- it hits us a little harder.
Guys in California and back East hear more than I hear right now, and I think at least part of it is that they are farther south.
That said, I think if you have a good rig and a beam or something more elaborate than the receiving equipment I have, you'll still do OK. No matter where you are, obviously, it's a trade off.
I know this is just an SWL's take on the region, but hopefully it will help fill out the picture a bit for the OP. 73.