STO: Basic Skill Tree Info ?

[Samurai Cowgirl]

Hi all,

I was wondering if anyone has any guides/links to share on the more general side for the skill tree in STO.  Questions beyond the wiki like:What space skills are a bit more useful than others? What skills are just stinky dogs and to be avoided? (Yup, I've found some) Are the "red" skill blocks worth the investment? Is a "Yellow-Green" skill level ship viable or not useful?

Lots of builds out there, just little explanation (and lots focused on end game gear), but I am starting to see common themes. Even with this, wiki, and test server I'm still not sure what some skills actually do.

I'll toss a few you tube videos below for anyone else in the same predicament (Space Tac/Eng focused). If any one else is in the same boat I can my random thoughts.

TIA
-SCG

Links:
http://www.youtube.com/watch?v=F1jkj1YY4T0      Overview
http://www.youtube.com/watch?v=pHHlcAwB1I0      Tactical Tree
http://www.youtube.com/watch?v=GxUK8YmuBpQ   Engineer Tree
http://www.youtube.com/watch?v=cpKS6Ys3cEg      Sci Tree

http://www.stoacademy.com/               Builds & Off line Skill Builder If you've not seen it