janas agrees: I think "Bones" will be forgotten in a few years, but the Buffyverse will remain long in the memory of many fans.
I quite like
Bones, but in general I agree. Angel is an iconic character part of pop culture, Booth is not. An argument could be made for Temperance "Bones" Brennan being a cultural icon, but Booth is one of a dozen military veteran-turned FBI agents on TV right now.
That said, he's one of my favorites in that archetype, and brings a unique energy, but it's not a defining character for Western media.
You look at William Shatner, I've never seen him play Captain Kirk in
Star Trek, I've seen him in lots of other, arguably more successful projects, yet I know him as Captain James T. Kirk. Never seen Tom Selleck play Magnum PI, love his other work, yet think of him as Magnum. Richard Dean Anderson is defined by MacGyver despite a huge television career spanning decades.
To be honest, I think Boreanaz will be remembered as Angel or not at all. Christopher Meloni had far more commercial success as Detective Stabler on
L&O: SVU (1999-2011), yet I strongly doubt he'll be remembered as Stabler ten years from now--that wouldn't bode well for Boreanaz' Booth of lesser commercial & critical success.