To my knowledge development has some lerning constraints
like, a person working in java technology can become a good
developer only after spending atleast 1 year or so. But in
QA within a short span like 1 or 2 years we can have a good
understnding about various domains like servers , security
types etc.. which inspired me more towards QA.

Developer can able to work in particular domains i.e., if 
developer know java then he can develop web based 
application, if developer know vb then he can develop only 
window based application(client-server applications), if 
dev know sap then he can work on sap only. but test 
engineer can learn more by testing various domains. I mean 
if u r testing web based application u can learn about web 
based application, similarly client server application, sap 
application, oracle application etc. Finally what i am 
saying is as a tester can learn more by working in 
different domains where as developer can learn only few 
things by working in particular domains.

I would prefer to the start with the follow :

i was in development intially and then the we were asked to 
take up testing for a new project. That is how it started . 
I like the testing job and opted to continue in that.  
After saying this you could talk about the above points