Feros->Therum->Noveria->Virmire; Ideal ME1 Mission Order?

That's okay.  He's not a favorite of mine.

To each his own. I love Javik. Especially on Tuchanka.

I've used him on Freos but I don't think he has any funny dialogue no. The only time I kind of remember is Virmire when he says to eat them. Or something like that.

I usually mix my groups up the only time I kind of have a set character to take with me is on Noveria where I tend to bring Liara due to going up against her mother Benezia. Other than that I either pick based on what class I am and a little bit of random as well. On my las trun I took Garrus and Ashley with me I think but that was some time ago as I've just finished ME2 in that run now. Just about to start ME3. Same with the Loyalty missions really in ME2 and that I normally mix things up unless I have to bring a certain individual with me. It also depends on my Shep's personality as well.

Yeah I tend to take Javik a lot there as well. Though I'm not taking him anywhere atm as I haven't recruited him yet in my current playthrough but that's mainly because I've only just finished the first mission on ME3 atm as I've just got to the Citadel for the first time in this playthrough

Yeah I finished ME2 earlier as I'm doing a ME/DA marathon atm as I finished Act 1 of DA2 yesterday. If things continue to play out the way they are I'll probably be hitting MEA and DAI around the same time.

I consider it a must. If anyone deserves to go to Eden Prime, it's those two. They were the two that were there from the very beginning. Liara isn't especially more an expert than Shepard on Protheans. At best, she has as much expertise as Shepard via "embrace eternity" but the ones who really know best are Shepard, Shiala and dead Saren.

I always take at least one human with me to Feros, since I figure that the colonists would be a little jumpy about aliens at the moment.

Other frequent "in-character" choices for missions -

Jack's recruitment - Usually some combo of Jacob, Kasumi, and Miranda, since Garrus and Zaeed may already be on the Blue Suns' shit-list

Jacob's LM - Mordin since we might need a medical expert

Jack's LM - *Not* Miranda, as we don't need to get sidetracked by arguments about Cerberus

Geth Dreadnought - EDI, since we're going to be dealing with some powerful AIs. (Though if you take Garrus, he has a funny comment to Tali about how her drone would confront the Reapers by just floating around and "making that...noise.")

Thessia - Javik. Even on my first playthrough, I had a feeling that he might know something about whatever was hidden in the temple, plus he has the most experience in front-line battles with Reaper forces.

Honestly I just shoot the guy whether or not I have enough persuasion to talk him down even on my most paragon of playthroughs.

All you need to do to pass the Jeong speech check early is start a NG+ game.  The points you previously allocated to Charm/Intimidate carry forward.  It's merely set up as an incentive to play an NG+ game.

You only need 10 intimidate.  The 10th intimidate slot unlocks with 81.25 renegade points earned.  If you start with an Earthborn Ruthless Shepard (20 renegade points right there) and take advantage of every possible renegade decision you can made on the Citadel, do a couple of the side mission planets that give renegade points or do BDTS DLC in a renegade fashion and assign 10 (sorry s/b 6) of your level up points to intimidate, you can pass Jeong's check even with Feros being the first main mission planet you visit.

There is a difference though between saying it's impossible generally and saying it's impossible as a paragon.  They obviously wanted some charm options to be tougher to get.  There's even a difference in the number of points you get for each equivalent decision - 8 paragon vs. 9 renegade and 24 paragon vs. 25 renegade.