I stopped reading Star Trek novels a long time ago (overal, my book reading frequency has gone down as has my free time), but my favorite novels where interestlingy TOS, even though at the time I preferred TNG as a series.
I recently picked up "Neverending Sacrifice" and a "Stitch in Time" and really liked those (I particularly recommend Neverending Sacrifice), but I have no real intention of following the current novel lines for Star Trek.
My favorite Trek is the Trek of my early syndicated childhood, so TOS all the way.
Followed by DS9, TNG, and Voyager (which is better than I remembered - the lows are some of the lowest, but the their are great episodes in the series). One of these days I'll revisit Enterprise, but it just didn't do much for me, except demonstrate that Scott Bakula can play a character I don't find charming or interesting.
Favorite novel? The Final Refection by John M. Ford.
Of course, TOS started that "crap". "The Naked Time", "Tomorrow is Yesterday", "Assignment: Earth", "All Our Yesterdays", and "City on the Edge of Forever" all included time travel. And then Trek IV, as well, before Next Generation came along.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.