Well the Me109 was a nice plane but lacked armour, operational range and ye, the landing gear issue.
1/3 of all ME109 where involved in landing accidents of wich 10% where completly destroyed
Also alot of FW 190's where assigned to defend germany against bombers.
But a Me109... During testing they found out that a .50CAL bullet had no problem in going in the engine block and coming out at the other end. It was a nice plane, but like the spitfire, not so well armoured.
It remained in production because of the low cost of these aircraft methinks.