Much of what I'd say has already been said, but a few tidbits ...
The Duke-UNLV & Arizona-Kentucky games played there were two incredible games, but it was also the site of Princeton's upset of UCLA in the second round (a game I had tickets to, but my uncle decided to take the 5-year-old cousins home after the first game, and I had to watch Princeton-UCLA on TV instead of in the 22nd row).
The Dome helped make Indianapolis a big-league city. In the five years before it opened, the city had lost its WHA team (folded mid-season in December 1978 ... not even teenagers Wayne Gretzky & Mark Messier could put people in the seats) and nearly lost the Pacers (they had to hold a telethon to save the team once, and Sam Nassi nearly moved it to Sacramento). The year before the Dome opened, the Pacers went 20-62 and were often outdrawn head-to-head by the local minor-league hockey team. After the opening of the Dome and the arrival of the Colts, the city's psyche changed rather tremendously. No longer was Indy "Naptown," the city was starting to think of itself as a big-time city. Within a couple of years, it was actively pursuing an MLB team (there were discussions with the Pittsburgh Pirates) and retrofitting the Dome to accommodate baseball. With the Dome, Indy was able to basically become the home of the Final Four and see itself not as the little cousin of Chicago, Cincinnati, Cleveland, St. Louis and Detroit in the Midwest, but as a player in that group. The Colts were horrible for much of their first decade and a half in Indy, but they put the city on the map.
A few things I remember ...
*-The first NFL game was between the Bears and Bills -- scheduled before the Colts announced their move.
*-The first regular-season Colts game. I remember the fan mag had something on the cover about a QB controversy between Mike Pagel and Art Schlichter (can we pick none of the above?), while the Jets started Pat Ryan instead of Ken O'Brien. The Jets won 23-14 ... the fans had no clue what they were doing. Did the wave and made tons of noise when the Colts were on offense ... it was nuts.
*-Colts 17, Steelers 16 in 1984. Ray Butler catches a tipped pass on the final play of the game and runs it in for a TD. The most improbable finish for a game.
*-The Halloween game in 1988 ... the best game of the early Colts history. But the day they clinched the AFC East in 1987 was pretty loud, and pretty special. Most of the early games were pretty comical -- watching a usually-inept team fall all over itself.
I started covering Colts games in 1997 -- the year before Peyton Manning showed up. It was somewhat interesting to see the change in the fan base over the ensuing 4-5 years. In 1997, most of the ticketholders were people who had grown up following someone else, and there was very little interest or passion for the team in Indianapolis. Whenever the Dolphins, Cowboys, Redskins, Raiders, 49ers, Bengals or Bears would come, it would feel like a home game for the visiting team (there is an incredible amount of Dolphins fans in Central Indiana). In about 2001-2002, when the Colts began their run under Manning (and after they replaced Jim Mora with Tony Dungy), the number of people who had grown up following the Colts grew to a point where they were able to afford tickets, and the decibel level of the Dome (and the football knowledge) grew exponentially. Suddenly, every fan in the stands was wearing his favorite player's jersey (seriously, in 1991, would you really be seen in public wearing a Clarence Verdin jersey?), and there was some passion and energy in the crowd. The place was so small, it could get *really* loud, even with the canned music/crap. Now, the city pretty much shuts down when the Colts play -- you can go to any restaurant in town you want and get right in.
It is probably as much a basketball venue as anything -- and for a dome, it wasn't a terrible basketball venue (that's like saying, for disco, it wasn't a bad song, but alas ...).
The sight of 40,000 people at a high school basketball game is mind-boggling. The combination of the NCAA Tournament's growing popularity, a bit of a dry-spell in Indiana HS basketball talent in the mid-1990s and the eventual onset of a class tournament made sure that wasn't repeated, but that was pretty cool (the State Finals were drawing 20,000+ for most of their run there). The year after Damon Bailey's title, Alan Henderson & Glenn Robinson's teams matched up for the title in front of about 31,000. The 1994 game between Valpo & South Bend Clay was incredible (Bryce Drew's Valpo team loses to a Clay team led by the Nailon brothers, and IIRC, future Purdue star Jaraan Cornell). The 1992 final between Richmond and Lafayette Jeff was an OT game with another incredible late-game comeback. Jeff Poisel's 3 at the buzzer gives Ben Davis an improbable title in 1996 ... also saw my alma mater win the first of its three state titles there in the first year of class ball (it was the big class ...). I'm glad someone else mentioned the Lafayette Central Catholic-Alexandria game in the 1998 Tournament of Champions (in front of about 2,000 people ... turnout was depressing but the game was incredible).
As a structure, it won't be missed. But the press-level seating wasn't bad (especially pre-renovation, when the box was at the top of the lower deck). The sightlines were pretty good -- there weren't any bad seats in the house. The big roof could kill the atmosphere at times (I hated watching indoor football ... except in December and January

), but the Dome did a lot for Indianapolis.