I didn't mind the sining in the original, but don't like it much in the re-do for TOS-R. The original was more "spacey" and not as up front and "woman singing" as the re-recording.
I did prefer the Fred Steiner arrangement of the first season theme, but Alexander Courage's is still really eerie. I always liked hearing it on the first batch of episodes in the old days before Paramount standardized them for syndication, making every first season episode (other than Where No Man Has Gone Before) have the same Steiner arrangement. The themes were put back for the first DVDs releases (and the season sets), but are mostly not there in the Blu-Ray (the theme was screwed up a number of times actually).
I did prefer the Fred Steiner arrangement of the first season theme, but Alexander Courage's is still really eerie. I always liked hearing it on the first batch of episodes in the old days before Paramount standardized them for syndication, making every first season episode (other than Where No Man Has Gone Before) have the same Steiner arrangement. The themes were put back for the first DVDs releases (and the season sets), but are mostly not there in the Blu-Ray (the theme was screwed up a number of times actually).