Mono
Interesting posts looking at the mono's handling. Perhaps the following consolidate observation's by PM and TTT.
To understand many of the Mono's ground handling characteristics get out your old bike, blow up the tires and go for a ride.
Roll left or right, the bike tracks left or right. Roll left followed by a right steering input the bike will sharply roll more left. Track straight then steer right produces a sharp roll left followed by track to the left. Increasing speed produces greater effect for less input. So as we all innately know, when riding a bike, control of roll controls track direction - the Monowheel is no different.
Slipstream and precession yaw the mono left add in a single left hand seat pilot producing left roll and the net result is track to the left. Coordinated right aileron, producing right roll, and right rudder is required to track straight.
Cross wind take offs demonstrate this point well. Traditional teaching is into wind aileron on take off roll. Left aileron for left cross wind will produce left roll and track, worsening with increasing speed. Right rudder alone will not overcome this and the other factors producing yaw left. Counterintuitively, right aileron is required for left cross wind take offs. Although speculation I think failure to appreciate these issues were the cause of early reported ground loops which were usually to the left.
Landing roll out frequently is associated with small rolls left and right as both outriggers don't touch simultaneously. Dealing with the tracking changes primarily with rudder, not aileron, can easily produce PIO's.
So yes the Mono has distinct characteristics which a good trainer will make you appreciate and handle well, leaving you to enjoy all the other previously mentioned features of the Europa.
As has been said many aircraft have ground handling issues but if they give the flying you want then don't be afraid of getting stuck in, otherwise you may never get to fly a Pitts!