I would say it doesn't matter too much in your level of experience or anything. You can catch on to any of them.
V.5 is especially cool to me, since you can have an entire family. It's a lot different.
However, the v4 is pretty cool too, it's a lot more like the v3, with some new features.
I'm not too sure about the v4.5, but it's my friends favorite version.
Hope I helped!