'why didn't you warn me'. I do rather like knowing there's probably a Trophy for taking the time to pet every Yak in the village and them finding out there really is.
'right on schedule' are kind of boring and I don't tend to notice them. If anything I dislike them as they tend to give away how far you are through, etc.
'I need a guide' I could do without. I really can't be bothered with the whole 'hang there for 2 minutes, walk over to there, knock over a passing granny then hop three times in place' totally random Trophy you'd never, ever get without actually looking it up or knowing the developers.
In general, the best Trophies/Achievements, as TRio_Zen (and I guess Nordlead reading his post) point out are those that challenge you fairly but are reasonable in context for the game.
Try to be reasonable... its easier than you think...
