Well for liking music a lot, I have found 3 theme songs from pokemon that stand out for me (but I liked all of them, even the pokemon chronicles one!)
The 1st theme songs was just epic, even though I hate to say it (almost everyone liked this opening). It suited pokemon perfectly and if you watched the first season, you can't help but to memorize the whole thing.
The 7th? Theme song was also very in my opinion (the one "this dream will never die" one). I play guitar, and the guitar riffs in this song was incredible. It also starts out soft and then the guitar comes in (a great tactic, also used in one of my favorite songs "jungleland").
Finally, I really liked the 11th theme. The drumming was really good (that roll in the begginning gets me every time). Although I rarely listen to female singing, I think they did a great job.
tl;dr: 1,7,11