I'm relief staff, so plug the gaps in our stations rotas, as not on a regular shift. It means I regularly change partner and can get 'farmed out' to other stations in the area. I think this is good for the probationary period as you see how many people work (good and bad) making it easier to adopt your own style rather than just mimicking the person you work with. Also it increases your work social circle in that you meet and work with a wide variety of people. I love my station and barring one or two difficult personalities (Nice enough people but you can't get on with everyone can you?) I have a great working relationship with everyone there. Having said that I'd love to a regular shift so I can know what I'm working more than a week in advance!