Why 7 years!?
This is where is all goes wrong. You can be a good teacher with good results, good feedback from parents and children and your planning/paperwork and books are good, but cock up on observations through fear (of crap, unhinged jobsworth SMT shafting you usually) and then you are on your way out.
If you are a shite teacher-lazy with marking and planning, the parents hate you and the children don't learn anything, but you pull observation lessons out of the bag-you can swing an Outstanding!
Luckily-I suppose 'triangulation' is supposed to remove this happening.
I think it's pretty irrelevent what your teaching is like as long as your books are marked well, your paperwork is clear, the children make good progress and the parents/children are happy. Why does it matter how you teach? especially when being watched by teams of people with clipboards-honestly, that can be terrifying.
If you take away the observations (only doing them if there's a cause for concern) we could probably halve the numbers of SMT in schools and then we'd have loads more money we could spend on pencils and books.
Sorry-that little tirade hasn't helped you, I expect.
What happens in your observed lessons-is it nerves getting the better of you?