Did you start from BG1 or was SoA or ToB your first exposure to the bhaalspawn saga? What class did you play? Who was in your first party? What do you remember about your initial impressions? Were you a D&D noob, or did you come from other forgotten realm computer games and/or PnP?
My first experience with the game was when I was in 7th grade shortly after Shadows of Amn was released in 2001. My friend's older brother blew through the game as he had played the first game and was eager for the second. My friend and I sat in the closet that his family computer was kept in and spent hours creating characters, playing through Irenicus' dungeon, and exploring Amn. I remember the quest arc through the slums district blowing me away the most. I was pretty much instantly sold and bought it at Wal-Mart for myself shortly after. I had had no prior experience with D&D and very little experience with computer games. In fact I think it was the first one I ever bought for myself.
My first character was a fighter/mage/thief because I had no idea what was powerful and figured that 3 classes is better than one. I absolutely loved pick pocketing everyone so most of my thief skills went to that. I didn't have any mind for tactics so all of my mage spells went to strait up damage spells, and most of the time I just ended up meleeing everything anyway. My first party was the first 5 good/neutral people I ran into so: Minsc, Jaheria, Arie, Anoman and Yoshimo. I remember getting pissed in Spellhold when Yoshimo betrayed me and getting Imoen back, severely underleveled. I ditched her as soon as possible and picked up Jan, who was still underleveled but a hilarious character to have around where as Imoen just seemed whiny. I didn't really get into the game play and mechanics until my second and third playthough, but I found the story and fights so engrossing and epic that it kept me going. I learned about cheat codes not far into my first playthough, (editing the .ini file made me feel kind of like a hacker) so I abused the hell out of them. I ctrl+J'd around all of the maps and spammed ctrl+R on my party though most fights (and still was not able to kill any of the dragons). Despite all of this noobishness I rushed home from school every day to play and have come back to the game and played BG1 - ToB+Ascension at least 6 times since then. I hope I never get tired of this series.
My friend and I found Suldanessellar hilarious because we pronounced it "Sold-in-a-cellar," and to this day we are still able to recite the opening lines of the torture scene and shadow thieves invasion in the beginning. " 'MORE. INTRUDERS. HAVE ENTERED. THE COMPLEX. MASTER.' 'They ACT sooner than we had anticipated...No matter, they will only prove a slight delay...' "
Also the manual for this game was amazing. I still read over it occasionally, mostly for nostalgia's sake.