Perv, I suspect (not really, I know) that you are good enough to take any plane and do well in it - your preference is based on the way you can press an advantage in a Dora whereas in other planes your opponent has to choose to stay (I suspect).
What i meant to say is that the 190 is fantastic at energy cooperation and performs exceptionally well in situations where you work with one or more to achieve energy superiority (without coming in with a massive alt advantage and basically picking which is what you see a lot of 51 pilots do). When under an opponent, the 109 is a far better (imho) plane to be in because it generates e faster and converts that e into altitude more efficiently while the 190 takes more time to generate e and alt (2 seconds faster for the k4 to 250 then then dora, turns tighter, climbs faster at all alts - and maby its just me but those 2 seconds 'feel' like a lot more). Which is why I (and I don't think I am alone) for smaller group stuff or situations where I am at an e disadvantage (which is almost always) the 109 is a much better plane in every respect. That aside, the A5 turns a lot tighter and accelerates almost as fast - and climbs better between 3 and 9k - add to that the slightly better roll rate, smaller target, lack of a radiator, gentler stall, and slightly better rudder authority - the A5 is a fantastic knife fighter and very well suited for the kind of fighting we see in AH. All it lacks in that blitzing top speed (but its not crippling).
In FSO and scenarios 190s are just much better then the 109s where the roll rate (more cons, more roll shows its strength), gun package, dive performance/high speed maneuverability (becomes more apparent as you go up) and views (again, more cons, more it shows) all really show off the reason the 190 is the better fighter in most respects.
The scissor and general roll related ACM (in various yoyos, in BRDs. and so on) is something I use a lot to throw opponents off sync and it works great for giving a friendly enough time to get down an clear me. The high speed flat scissor is especially good in the 190 since you can basically keep the opponent looking at you, while also moving in the same direction - and since you are looking back, you can time the final unload before you execute the overshoot or the 'you follow you die too' evasive. But again, this only shows where you have someone sandwiching the opponent - and most will take a few shots and break - which means you live.
the radiator bug, which I really do consider a bug because it happens so often it could not be anything but. . .is a major source of frustration for 109 and dora/152 pilots - which is why i mentioned the A5 as my workaround - I still feel most comfortable in the k4 though but will not start my night in it because it gets me frustrated (really, its only the radiator crap, the tater is a joy) and that is not how I like to start a session.
anyway, my 2 cents.