Well I am happy that you liked it, if you received entertainment out of it you got alue for money.
I on the other hand didn't it pissed me off so much I discarded the PS2 altogether, through both games with it (but the deal fell through and I still have the system and the games, and I don't feel that much hate towards them anymore), and I would never play through that game again...
All those side missions were pretty annoying as well to think for PS3 you will have trophies for all the extra crap and loose points if you don't play them, thank god the hores aren't in it atleast.
This post is getting way to long, I could go on and give examples of everything I hated, but I don't need to cause you didn't dislike them, Skarky was pissed off they changed Sonic's shoes in Adventure 2 and I wasn't, Aki-At questioned the plot of SA2 and came up with massive plot holes and I agreee that those are flaws, but I enjoyed the game so much that I simply overlooked all those flaws and it is my favourite Sonic game
In the end what it really comes down to is immersion, where you hooked or not, if you weren't than you find flaws in the things that are functioning properly as well.
I am sorry, and I am glad that you liked the game but I invested good money into it and I expected a better game, you on the other hand were happy with what you got.