I'm 11.1% mainstream. This percentage is misleading, though, since it appears to be calculated on the basis of what FOT at large have scrobbled, and my own tastes account for little of it (I've barely scrobbled a thing; I mostly just listen to WFMU when I'm online). Indeed, I don't recall ever hearing some of the bands on the list, and others I downright avoid.
I do like X-tal, though.
1 X-tal 0.00 100 %
2 Jay Reatard 0.23 93 %
3 Ted Leo and The Pharmacists 17.14 60 %
4 Maskull

60 %
5 WFMU and Tom Scharpling 0.03 40 %
6 Scharpling & Wurster 0.03 20 %
7 Talking Heads 31.39 13 %
8 Ennio Morricone 16.24 13 %
9 Ultravox 6.28 13 %
10 The Birthday Party 3.33 13 %
11 Cat Power 35.61 13 %
12 Palace Brothers 1.67 13 %
13 Radiohead 103.57 13 %
14 Wu-Tang Clan 18.42 13 %
15 Add N to (X) 3.22 13 %
16 Steve Earle 4.41 13 %
17 Frank Zappa 19.65 13 %
18 Cheap Trick 10.66 13 %
19 The Damned 7.14 13 %
20 Mogwai 34.10 7 %
21 Eileen 0.25 7 %
22 Q and Not U 8.59 7 %
23 The Shins 61.43 7 %
24 The Jesus Lizard 2.52 7 %
25 The Flaming Lips 50.63 7 %
26 The Beatles 101.49 7 %
27 The Smashing Pumpkins 67.67 7 %
28 My Bloody Valentine 24.07 7 %
29 Flamin' Groovies 1.21 7 %
30 Streetband 0.01 7 %