azzurri08 said:
You guys sure no how to treat a newbie well.
You made it easy by telling us your favourite aspects of aired ST, but I see everyone's beaten me to the usual recommendations. You have no idea how many people just say, "Recommend something..." but give no indication of their personal preferences.
As you can imagination, some of the ST novelists also delve into humour, tech, politics, war, characterization, alien world-building, nostalgia (ie. reunions, sequels to aired episodes, return of alien races, etc), and this makes blanket recommendations rather tricky.
Some personal TOS faves that would be worth picking up if you see them on your buying sprees: Pocket's first original novel, "The Entropy Effect" by Vonda McIntyre; the first three movie novelizations (TMP by Gene Roddenberry and ST II & ST III by McIntyre"), which all greatly expand the stories of these movies; "Yesterday's Son" and "Time for Yesterday" by AC Crispin; and the quirky/meaty "Uhura's Song" by Janet Kagan.
Re TNG, I love "Immortal Coil" by Jeffrey Lang, a wonderful Data novel and a great "whodunnit" set in the TNG universe - but it works
even better if you've seen all of TOS.
And a plug for "New Frontier", "Vanguard" and "Titan": amazing original-to-the-novels series to get totally absorbed in, peppered with several canonical guest ST characters as regulars.