Whenever possible I always play 30 minute matches in PES2 - for me that's the only way to go when I want the feel of a real soccer match!
But playing 30 minute PES2-matches also reveals that the PES-series has a long way to go before it's a real true-to-life soccer simulator.
You get way too many shots on goal and score way too many goals - it's not uncommon for me to score 10 or 12 goals with Brazil against other (skilled) human players who are using Italy or Argentina, and I also see a lot of 5-5 or 7-7 draws between these teams.
But wouldn't it be great if some time in a future version of PES you could choose to play full 90 minute realtime PES-matches which would end in 0-0 or 1-1 draws?