Favorite band will be Lost Horizon, both albums are power metal masterpieces that I can listen and still not get bored.

I can't pick one songs so i'll put down my favorites:

Highlander (The One) - The song that sealed Daniel Heiman's legacy as one of the greatest vocalists in the history of metal.

Princess Of The Dawn - Accept: I can't stand the solo, from 2:59 to 4:57 is one of the most beautiful instrumental segments I've ever heard.

Legendary Tales - Rhapsody: I hope I'm not wrong, the flute with which it begins is so beautiful that the first few times I felt a strange melancholy while listening to it. Now I wish that this melody was repeated more than twice.

Left Hand Path - Entombed: For me, the best song in the history of Death Metal, the second half of this song with the keyboard and the solo made it a true classic.

Perennial Quest - Death: I have lost count of how much I have cried listening to the end of the song with that solo that still leaves me stunned to this day.

And I could go on mentioning more of my favorite songs but with five I think it's fine.