Well I am probably one of the least likely people to give job advice .... .... but what sort of jobs have you had and what job are you going for?

I can relate to the bit about doing ok at interviews but struggling on the job, but for me that was mainly because of my anxiety ..... I think ... well I do have a degree although I haven't really used it

Maybe being too happy might scare people I suppose... have you had counselling or seen a career counsellor?

I hope some of this helps

Take care,
Fuzzy