I know Suikoden II is considered to be the best by the majority, but for me Suikoden V tops it.
The characters are memorable, including the lesser stars of destiny. Everybody has a backstory! Nobody just joins without any story detail. Yes you will definitely need a guide to not miss any character, but it is worth it in my opinion.
Also that music! Aside from Haude village, the OST is amazing! Stormfist and Raftfleet are great just to name a few.
Lastly, the story is not your typical save the world story. It does take a while to build up, but all those initial hours are necessary to set up for the big "event". The story is so good that even IGN named it best story for the PS2 in 2006.
By no means a perfect game, the game deserves a second chance via PSN. Make it happen Konami!