The self-harmonising in the second chorus of Redemption Blues is brilliant and makes it one of my favourites.
Sovengarde Song, Take It Back and Normandy are just epic.
Legends of the Frost (feat Malukah) is beautiful.
Joker's Song reminds me of a Disney villain song, and is spot on in every way.
And New Black and Gold is just awesome.
I don't not like any of his songs - I'm often listening to them.
Also, if you haven't, I definitely recommend checking Malukah out- her voice is lovely. My favourite of hers is her Mass Effect 3 song "Reignite". It's stunning. It captures the emotion of the game perfectly.