Seat advice for a few flights

So I've started to prepare myself for the seat selection which apparently will be available for PE/UC for all pre-booked flights from next Tuesday
. I have the following premium cabin flights booked already, all of which I'm travelling with the hubby. I know that there are bits of advice floating on this site, but I've ran out of patience looking into it too much more, so Would very much appreciate your advice on the below:
LHR - ORD in UCDS (A330) and the return journey - I'm thinking two of the 3-6A or K? Is there a "better" side in terms of views coming into and leaving Chicago?
LHR- SFO in UC (744) I'm thinking, 2&3A or K? Are all the UC seats on the upper deck equally as good?
LAS - LGW in UC (744) 8&9A or K?
Finally, GND-LGW (on LGW A330) in PE 20A&C/H&K or 22A&C/H&K (wanting to stay upfront so meals don't run out
Any advice is much appreciated!

LHR - ORD in UCDS (A330) and the return journey - I'm thinking two of the 3-6A or K? Is there a "better" side in terms of views coming into and leaving Chicago?
LHR- SFO in UC (744) I'm thinking, 2&3A or K? Are all the UC seats on the upper deck equally as good?
LAS - LGW in UC (744) 8&9A or K?
Finally, GND-LGW (on LGW A330) in PE 20A&C/H&K or 22A&C/H&K (wanting to stay upfront so meals don't run out

Any advice is much appreciated!
