I normally drink Guinness if I go out and I think it is a nice pint in the UK but not as good as the Dublin brewed stuff. With regards temperature, I think that Guinness does need to be a little colder than a real ale but the Guinness Extra Cold that a lot of pubs round here offer is too cold.Some of my favourite bitters: Ruddles County, Abbot Ale, Bass, Norton Old Hookey, Wadsworth 6X.
Worst bitters; Robinsons, Wherry.
For something to drink at home, I am quite fond of Newcastle Brown and McEwan's Export.
Jon