I really like the First lounge in T5, big, bold, sort of trendy, very airy. I also like the First lounge in Gatwick, it is more cosy and I've spent soooo many hours in that place it almost feels like home
hmmm... probably the worst "First" lounge I've been to, was in HKG. It was kind of dull, so I went into the Cathay lounge instead (the very long one with a noodle bar etc), this was much better.