Personally its the squad thing that works for me - when we get 4 or more on, we wing up and try and cause as much chaos as we can. We do the base capture thing if we can find one that has uppers (waaay more fun to actually fight for it) Recently we captured with just 3 of us on - 1 x 110, 1 x tempest and 1 with troops - I had to make multiple runs in the 110 to take town down, Bruv was engaging everything with his temp, and Stu ran troops - there was no way we should have taken the base, but we did - and had fun doing so.
All countries to me seem the same, same gripes, same methods - not really found 1 that was different to any of the others - it seems to depend who's online and when.
If I'm flying alone, I'll up wherever needs defending/attacking etc - much prefer fights to come to me, unless I go out and pick one.......which generally ends up with me dying, but I'm having fun with it either way.
YMMV,
<S>
Wurzel