I have no problem seeing anyone attracted to Faye. She's spunky and sassy and witty and curvy.
I had no problem seeing what Faye liked in Marten. He's loyal and patient and bright and treated her like a goddamned queen. And I had no problem seeing what Faye found attractive in Sven. There was spirited give-and-take from someone who could call her on her bullshit and vice versa. (Plus the sex appeal that apparently emanates from him, even when he doesn't want it to.)
But Angus? As far as I can tell, he's just a pre-existing male character who was available and unentangled. So far as I can tell, his chief selling points are that he's an okay guy who is attracted to her and is unthreatening. He's Marten II: The Rushed-To-Theaters Sequel. He's been in, or been referred to in, 120-130 strips now and yet we know little about him, and what little we do know has been thoroughly boring. (Compare this to his recently introduced roommate, Marigold, who is one of the breakout stars of the strip.)
To sum up, Angus brings nothing to the table. But if you don't believe me, I have a reading list for you.
(Page numbers in parentheses are when Angus is off-screen, but being mentioned.)
Maybe-Angus?:
375, 710
Early Angus:
767, (769), 779-780, 783-784, (785), (790), 853, (854), 898-900, 1121-1124, (1144)
Current Angus:
1363, 1368-1369, 1371, 1373, 1384-1391 (1390), 1393, (1394), 1410, 1419, 1422-1423, 1425-1429, (1431), 1441, (1444), 1445, 1448, 1471, 1475-1476, 1487, 1491, 1494-1495, 1501-1502, 1504-1505, 1531, 1533-1536, 1558-1560, (1561), (1563-1564), (1571), 1573, 1583, 1590, 1597-1601, 1613, 1615, 1617, 1621, 1623-1637 (1627) (1629), (1639), 1642, 1663-1665, (1667), (1669), 1673, 1675-1687, 1689-1693, 1702, (1703-1704), 1723-1725, 1731-1735.
If anyone is enterprising enough to use this data to make a link list, more power to you.
P.S., considering what we now know about Angus's "housemates", 1363 seems to be some sort of continuity error.