I went to Shrewsbury for the first time last year, and I went alone. The various performance venues range from the intimate (the Pavillion and smallest marquee) all the way through to the huge main stage marquee - and it was all quite chilled out. Camping was great, food was great, showers were great - all in all hard to fault. It is very spread out which means that you do not get the density of people that you do at festivals such as Cambridge, where I find it easier to get talking to people (I go there alone as well) - but I am sure others would find that a negative aspect. I guess it depends how gregarious you are - personally I'm quite happy with my own company most of the time, and find it quite hard to talk to strangers - having said that folk fans tend to be quite friendly wherever you go, you just have to make a bit of an effort I guess.