Jan had a great, distinctive voice in his early years. Two songs that I pointed out before were Batman (which for some reason I think was his best vocal ever. Listen how he pronounces the word Socialite and the word Night.) and Hot Stocker. These two songs stand out to me as well as many others such as A Beginning From An End, another classic vocal by Jan. As far as Jan's post accident, a great vocal and one of his greatest songs is Sing Sang A Song. I can't figure out what the song is about but I love it. Skateboard Surfin' USA is another great one. I like it better than Sidewalk Surfin'. Great production and vocals by all. Back in the 60's, 70's and (ok) 80's singers had distinctive, recognizable voices. Elvis, Janis Joplin, John Lennon, Jim Morrison, Mike Love, Dylan and on and on. Jan was no exception, his voice stood out early and later in his career. When Jan & Dean sang together, there was nothing better than that!
