A google search of "Virginia poisonous snakes" shows me these three: timber rattler, cotton mouth, and copperhead.
A google search of "Oregon poisonous snakes" failed to turn up much of anything -- although I know rattlers exist in Oregon, mostly on the "dry" east side of the Cascades, with a whole lot of them along the Deschutes River. Seems like the Cascades (at least on the west side) are pretty devoid of rattlers. At least, have never seen one in that area over all the time we've lived in Oregon.
Seriously though, after finishing college nearly 40 years ago in Austin, TX, my wife and I went through the same experience of figuring where to live. We were very biased toward finding a place that would be as much as possible like Yellowstone NP, since both of us had worked at summer jobs in that park while in college and knew we didn't plan on being rich enough to fly to that kind of place at the drop of a hat to hike, fish, and camp.
We initially decided on Washington state for its terrific mountains, rivers, lakes, and abundant nat'l forests, not to forget its three great national parks -- the North Cascades, the Olympics, and Rainer. But first we moved to Oregon for three years of law school, intending to move on to Washington afterwards. After three years in Oregon, we grew to like that state for the exact same reasons that made Washington attractive to us in the first place, plus Washingon's outdoors are just a few hours up the freeway from the Willamette Valley in Oregon.
As for concerns about "evergreens" -- referring to Douglas Firs, I suppose -- Oregon has a whole lot of 'em for sure. But there are a lot of areas with other kinds of trees (Ponderosa Pine, as well as many hardwoods that do in fact show a lot of color in the fall) -- and there are even a lot of spaces with no trees at all (check a map of Oregon to see how much land exists east of the Cascades, to include a lot of "high desert").
As for "socialized medicine" -- haven't had any personal experience with that since insurance coverage has been a part of all my employment. The same doc I saw starting in the mid-1970's is still practicing on how to keep me going.
As for "cultural" or "social" preferences, seems there's a little bit of everything for whatever you prefer. If real left-wing is your thing, there's Portland and Eugene. If rural traditional rings your chimes, well, probably 90% of the land area has your spot somewhere.
Bottom line (for us, anyway) was mostly the availability of a lot of public land, a whole bunch of it -- something that was very scarce in the Austin area. We once drove a very, very long day to get to Big Bend NP for camping and backpacking while we lived in Austin. Otherwise, not a lot of public land to be had in that area. Perdenales State Park, and a few other state parks here and there. I do recall that there are a good bit of national forests in East Texas, though, along with some huge reservoirs. And a variety of poisonous snakes, too.
Here in the Willamette Valley, it's only an hour or two to wilderness areas like Mt. Jefferson, Mt. Washington, Mt. Hood, Three Sisters; and about the same to great fishing rivers like the McKenzie, Nestucca, Siletz, Umpqua, Rogue, Santiam, Deschutes, Metolius, and more. There's Oregon's coast, too, with sandy beaches and rocky cliffs an hour or so from the Willamette Valley -- spectacular!
Then, of course, Washington is just up the road.
Almost feel guilty spending money to go elsewhere when the NW has so much to offer for little expense getting there.
As for rain, weather, and other such issues -- rain storms in Texas can easily dump more water in an hour (or less!) than you ever see over the period of a week or even more here in Oregon. But overcast skies in Oregon might get a little old for some folks -- especially after the third or fourth month without significant sun. Wearing sunglasses with yellow lenses takes care of that. And the evergreens don't look so green that way.
PS -- On second thought, maybe we don't really "live" in Oregon, but are instead just "visiting" since I do recall stopping at Oregon's border as we drove from Texas in 1973 to take a picture of our U-Haul trailer hooked to our car, right in front of the huge sign that said: "Welcome to Oregon, Enjoy Your Visit".