An ideal job depends on many factors, mainly depends on what each person wants. For me the ideal job is a job where you work at something you like, because if you work at something you hate, you will never be happy. Also an ideal job is a job with many holidays, good working conditions and good salary.
I like so much technical drawing so my ideal job would be an engineer but I don't know what degree I want to do yet.
Anyway, I think the ideal job doesn't exist because it is very difficult to find a job like that and people always end up getting tired of doing the same job every day.