The interesting part of the glitches and bugs in the early SA1 and SA2 is that people actually took a comedic approach to them. If you look at SA1 and SA2's gamefaqs boards, there's a full list of glicthes and how to actually do them and back then it was actually fun to trigger them.
Because here's the funny part as buggy as SA1 was, it's core gameplay remained solid and that's what made it so special at that time.
But frankly Sonic Adventure does require some skill to play as with some Dreamcast games, you get better with how much time you put into it.
I take Crazy Taxi as an example, back in those days, I managed to get Awesome rankings and I recentely played again only to get a stinkin' S-rank and little more.
Even playin' Sonic Adventure 2 recentely and I felt nervous and uneasy playing it, it's like my muscle memory was entirely gone and only plowing the game again can you get somewhere.
On a negative note, I wished Sega would make an english version of the Dreamcast Reprint(Dreamcast Collection) website.
Update:
@Barry
Thank you, Barry. Now I want this game so badly, it hurts.