Now that I've got quadruple strength diluting juice, I wouldn't really go back, but I love any citrusy still drink. Any berry flavours I'd have to be desperately hungover and dehydrated (apart from Ribena, but I'm sure I went off that last time).
The French Oasis (which I think is an entirely different brand) is fucking wonderful. Their sugar free tropical version is something I bring back every time I go to France. Amazing!
I can't be dealing with weak squash at all (the reason I drink lots of squash in the first place is to up my water intake when plain doesn't cut it for me), to the extent that when I make a glass, it's often near 50/50. But I'm a big fan of Oasis!
I will happily drink either flavour, but the majority of the time my preference is towards citrus.