Without bothering to read any of the other posts, as I do not consider any day could be counted as 'good' (refer to the meaning of nice) out in so called field service, but, if I had one in memory, it would be the day in November 1988 when witnessing around my local town, and I said to myself "This is the last time I am doing this shit". And that was it. No more. A pleasant day indeed.
Cheeses. No fond memories of the cult - it was all fucked up from the word go.