First licensed back in 1973 as DK8KW, I am a collector of call signs (amongst other things ...).

I have operated under the following callsigns:

DK8KW W1KW EI7JY EJ7JY MØKWD MDØKWD MIØKWD MMØKWD MWØKWD OH4KW 7S7S
 
ex: CN2HK C31JE C6AKW DI2BO DK8KWA FØBEG G5BXG JY8KW OK8AHC OM9AKW ON8KW OR8KW PA9APG SO3KW S1AH TKØBEG VK6BKW WD3B Y29DH 9H3RF
 
DK8KW/EA EA6/DK8KW DK8KW/EA8 EA9/DK8KW E7/DK8KW FS/EI7JY  DK8KW/HA5 DK8KW/HB DK8KW/HBØ IK/DK8KW IK/DK8KW/1PØP KP2/W1KW LA/DK8KW DK8KW/LX LZ/DK8KW DK8KW/OE OHØ/OH4KW, OZ/DK8KW PJ7/EI7JY DK8KW/SU DK8KW/SV2 S5/DK8KW TA2/DK8KW TK/DK8KW TR/DK8KW UT/DK8KW DK8KW/VE6 YO3/DK8KW ZA/DK8KW ZS1/DK8KW 3A/DK8KW 4O/DK8KW WD3B/5N3 9A/DK8KW
 
W5/DK8KW, EI/DK8KW, EJ/DK8KW, Y2/DK8KW, DL/Y29DH, PA/FØBEG, DL/VK6BKW, DL/WD3B, FØBEG/OE OK/DK8KW OM/DK8KW ON/DK8KW PA/DK8KW M/DK8KW MI/DK8KW MW/DK8KW MM/DK8KW G/DK8KW GM/DK8KW SP/DK8KW SM2/DK8KW

DK8KW/mm (on my own boat named Luna, marine call sign DK8888)

DK8KW/am (on board a friend's hot air balloon)

WD3B/mm (on board the oil drilling platform "Ron Tappmeyer" in the Adriaric Sea)

WD3B/am (as a passenger on board a one engine plane over Austin/TX)

Assigned, waiting to be activated soon: MJØKWD MUØKWD 5P8KW

 
Assigned but never used, expired: AA5SV EI4VTT GU5BXG MOØKWD 

Before being licensed (at the age of 14 I was too young to become a ham radio operator at that time) I used my father's call sign DL6PE for almost a year (only in hand-made CW, under his supervision, and yes: it was illegal at that time ...).

Today in Germany we are allowed to have non-licensed people operating under our direct supervision. We do have special call signs for this kind of operation, mine is DN1OK. 

I also used to be the responsible operator for a school club station at my German high school Gymnasium der Gemeinde Huerth (today Ernst Mach Gymnasium), callsign DK0HG

,