Each has their own positives & negatives.
The beginning is a crap shoot & really just a matter of survival, on the other hand, it is a chance to accumulate chips early, while the frenzy is ongoing.
The middle for me is my favourite, not always, but it is a chance to play actual poker, as there as less & less crazies, depending on your style of course. It is also a good opportunity to take advantage of the bubble as players tend to tighten up & you can accumulate more chips, by being more aggressive &
bluffing more.
The end can be nerve racking, approaching the
real money, concentration & making minimal mistakes as possible, but you need to use your full skill set to move up the ladder, there is no hiding, you have to get involved, as the blinds & antis force you too.