I'm gonna admit that I pretty much read none of the previous posts in this thread. I'm lazy, sue me. Please keep in mind, that I only play the xbox versions of the games, so all my gripes with the last games apply to the console version. Look, Obsidian. We know you're either at least in the planning stages of the third installment or planning to do a third installment. Based on the success and popularity of the series, it doesn't take a rocket scientist to figure out LucasArts is gonna be pushing for a third game. So without further ado...
I liked KOTOR's story better than the sequel's, but I liked KOTOR II's ambiguity. I know Obsidian has completely different writers than BioWare, but it would be nice to see a balance between the two writing styles in the third.
The influence system was awesome. Keep it in. The option to make some of your companions Jedi was great. The sole reason I play Star Wars games (post-N64) is for the Jedi, so don't hesitate to keep that feature in the third game. For those who don't want a lot of Jedi, they dont' have to train their companions to be Jedi. Everyone wins. However, I hated the fact that Bao-Dur couldn't wear robes because of his lack of arm. In order to give him any protection, I had to stick him in armor, which restricted most of the better Force powers. What a rip off.
The light/dark side system was implemented much better in KOTOR II. I'm looking forward to see the improvements in the third game. Honestly, I wouldn't care if it was improved. If it ain't broke, don't fix it. (But don't be lazy either. I'm a stickler.)
The item system in KOTOR II was better for one reason: it had more stuff. A lot more, actually. But for some reason, out of the countless times I played the game, 90-95% of the time I ended up with bottom-of-the-barrel items like chemicals, shields, and small amounts of credits. In other words, I got everything I didn't need and nothing I did. Countless games I would go without getting a single Jedi Knight robe. Items are my favorite part of this series, so you can imagine my frustration at getting nothing. I liked how KOTOR had (for the most part) set loot drops in terms of lightsabers, crystals, and robes. It was nice actually having more than enough robes Perhaps in the third game, you guys could make some crystals and robes appear at set locations. Or maybe improve the loot tables so that better items drop more frequently at lower difficulties. I'd actually like to equip my party with decent robes. What can I say? I'm a robe freak.
I think everyone will agree with me that we need (not want, NEED) more visual customization for the main character. Perhaps not just choose from pre-made heads, but actually create our own. Nothing too detailed. Perhaps choosing just a basic face shape, eye color, hair, facial hair, and skin color. I would also LOVE to make an alien character.
Please interject some Sith/Dark Jedi throughout the game. I'm not talking weaklings with staffs. I'm talking lightsaber-weilding bad @$$es that jump you at certain points in the game like in KOTOR. Speaking of Sith, I really liked hanging out at the Jedi Enclave on Dantooine with all the Jedi. That's one of the things about KOTOR II that bummed me out; the lack of Jedi NPCs. I know it was important for the story, but still. Interacting with more Jedi would be a plus.
Adding ranks would be a nice addition, too. Please keep presitge classes. That was a great idea. The ranks I'm talking about would actually take more work than just reaching a certain level. Perhaps completing a series of side quests or getting a certain amount of light/dark side points would grant you a new rank. The ranks would be Padawan, Jedi Knight, Jedi Master, Sith Apprentice, and Sith Lord. Everyone would start out as a padawan and depending on your allignment, you'd get an appropriate rank. Perhaps each rank gives you stat and damage bonuses, making you stronger.