How about a "flighty Renaissance man or woman."

In other words, a person who can do many things well, but who flits from one completed project to another, having lost interest in what was just achieved but eager to try something novel and hence to him or her, exciting.

Then there are the following:

• a flighty generalist.

 
• a person with a high threshold for achievement, but a low threshold for boredom. (I kind of like this one.)

 
• a serial (or compulsive) goal setter and achiever.

 
• an overachiever

 
• a new-goal-oriented person

 
• a serial implementer (Not bad.)

 
• a serial visionary

 
• a compulsive doer

 
• an accomplished manic-depressive

 
• fruition boredom (I really like this one!)

Take your pick, but let me know if any one (or more) tickles your fancy.

How about a "flighty Renaissance man or woman."

In other words, a person who can do many things well, but who flits from one completed project to another, having lost interest in what was just achieved but eager to try something novel and hence to him or her, exciting.

Then there are the following:

• a flighty generalist.

• a person with a high threshold for achievement, but a low threshold for boredom. (I kind of like this one.)

• a serial (or compulsive) goal setter and achiever.

• an overachiever

• a new-goal-oriented person

• a serial implementer (Not bad.)

• a serial visionary

• a compulsive doer

• an accomplished manic-depressive

• fruition boredom (I really like this one!)

Take your pick, but let me know if any one (or more) tickles your fancy.