He told me once: Never try Therion, you won't like it. Experience had told me that all not recomended things are quite interesting so I disobey him and he is angry i think since 2001. Since that he only recomend me hiphop bands, imo and R&B. Also he gives me links of bands that i should not listen (very protective man): Progressive rock, metal, classic, folk, etc is forbidden.
(I'm just joking, if someone felt that this was an atack of their beliefs don't take it personal)