I probably go to a half dozen other concerts of chamber music, solo recitals, etc at various venues in the Baltimore, Washington DC area.
I sing in the Baltmore Choral Arts Society full chorus and chamber chorus (www.baltimorechoralarts.org). If this counts it is another 6 to 8 per year. Interestingly, I almost never attend a choral concert I am not performing in. Being in the Chorus and usually in or near the front row, I guess it is surround sound listening.
I also usually get in at least one opera or ballet a year.
At the Meyerhoff Symphony Hall in Baltimore the best seats for soundstage, orchestra balance, etc, etc is actually the middle of the cheap seats in the upper tier in the back of the hall. The sound up/back there is really great, unlike many concert halls (and it is cheap). The seats up there are usually full of musicians and other music lovers who know how good it is up there. The people who go to be seen are on the main orchestra floor level. I also like to watch, so my view of the whole orchestra from above in the box is perfect.