Well, apart from quibbling about "Central Asia" & "both Koreas" (please show on a map Russia's borders with S. Korea, Uzbekistan, Tajikistan, Kyrgyzstan, & Turkmenistan), that's a reasonable point. If you run an authoritarian state with shared interests with Putin in quashing any democratic nonsense, or have the second biggest (& heading for biggest) economy in the world & spend on your military to suit, or are sandwiched between Russia & the aforesaid superpower with neither wanting to provoke the other - no, you have no problems with Russia being on your borders.
But for anyone else, i.e. any country you might actually want to live in, Russia's a bad neighbour.
Well to be honest, Russia has no land borders with Sweden either, and it's land border with Norway is more symbolic then anything else. So if we're interpreting borders to mean not a literal ability to walk across from one to the other, but the immediate geopolitical vicinity, then South Korea would very much apply.
And in all honesty while the rest of Central Asia doesn't necessarily share a land border with Russia, even if they did the situation would not be very different. Not to mention that they would probably receive much more Russian military aid (especially Tadjikistan and Uzbekistan) if they were on Russia's border, as opposed to an entire Kazakhstan away. They're friendly with Russia in many ways because of the southern threat, and rising Chinese influence, not to mention the traditional historic ties, and the fact that Russia came through for Tadjikistan in a big way in the 90s.
And of course we're missing Belarus. As for places to live, let's not forget that Georgia is a pseudo democratic plutocracy with a fairly low standard of living, and some fairly heinous warcrimes in its recent history. And of course Ukraine.... well enough said. I think the common factor is not a nice place to live but more so post-Soviet nationalism. It's almost the same as it was with western colonies in Africa, where once the locals took over they wanted to erase any presence of the former colonial masters, some going as far as Rhodesia did. And of course once the empires left Africa, things didn't exactly get better. Now because Africa is far away geographically, and because the empires turned into liberal democracies (not overnight but over time), they let it go (for the most part, hint hint France in Mali). Russia is geographically closer, and politically more prone to modern imperialism, so they're less willing to relinquish heavy handed control. I think the correct analogy with Russia and Ukraine is France and Algeria, rather then 1930s Europe. The same way that many Frenchmen regarded Algeria as not a colony, but a piece of France, just overseas, many Russians regard Ukraine as not a country (not really anyway) but just the south-western portion of Russia. These views are not in the majority, but they do have a fairly sound historic basis (if you read literature written in Ukraine during the imperial period, you won't really see Ukraine as much as you will see Novorossiya and Malorossiya). And even in Soviet times Malorossiya was a perfectly acceptable, and not in the slightest derogatory, term for Ukraine.
What stands out from this are the Nordics, and I really have to wonder what Putin's intent with regards to them is. Viktor Rezun (aka Suvorov) mentions in Aquarium that giant no-warning exercises were indistinguishable from war, even for their own participants up to a point, as a way to keep NATO from knowing whether this was the beginning of WWIII or just training. Maybe the current probings into Nordic airspace are meant to set the stage for a potential future move in the arctic, where Russia will grab certain disputed real estate, and it won't be realize that this time is for real until it's too late. But this is just guesswork. Personally I think it's a huge miscalculation. The correct way to go would have been to leave them alone, and cultivate friendly relations as much as possible. It would have gone further towards splitting NATO and the EU on key issues, and overall toned down the western response to something like Ukraine.
