I liked the fact we went to each LFS environment last year, a lot of variety.
BL1 - better for overtaking than BL1R due to the way the back straight is, but cars more easily flipped at the chicane and final corner.
SO4 is overused (MoE/IGTC etc) so SO4R is a good choice, or perhaps SO5 or even SO5R with the epic downhill hairpin
. IMO, SO5.
FE3R was a bit fail with the final chicane, so I'd say go for FE3. FE4 is too long IMO, I think with all these long tracks you have to think about SCs as well, like how long it'll take for everyone to get caught up.
KY2 or KY2R seem the best choices for Kyoto, KY3(or B) is too long and not really suited to cars which are more like GT3 spec. Perhaps this can be kept to the penultimate round of the season, where it could be replaced by Rockingham if it's released? On one hand I doubt it will be released any time soon going by the recent delayed patches, yet on the other it looked pretty damm complete when I played it!
WE1R for the reasons given by Passo.
As for Aston, hmm I personally wouldn't like to see AS4/5/6 given they are 5 miles each. Funnily enough, AS7 is actually shorter than AS3! Though, AS3 is overused in LFS, so perhaps running it reverse would breathe new life into it and make things more interesting! But yeah any of those 4 Aston tracks would be fine by me.