i make up a lot of nicknames too.
when i was around 12 i started calling my brother wafer (his name is dave), i still call him that 16 years later and it sounds foreign if i call him by his real name (like if we're in front of his friends).
nick:
it started with boo, which turned into...
booberry
boober (most popular)
boobs
boobaloo
booberino
bootber (boober with a german accent)
finn:
there are soooo many...
finny bluecheese
finny blue
finny b
mr. cheese
monsieur fromage
sausage pants
sausage butt
sausage face (all sausage nicknames were inherited from rudy)
buggy
bugaboo
bugaboobaloo
babyhead
finny-gann
finnegan beginnagan (like "poor old michael finnegan... begin again")
many more, but mr. cheese is most popular
nick calls me:
bee
beeber
beetber (beeber with a german accent, we're weird and pretend we can speak german.)