Sometimes I am confused about whether I should use the G or the F# as the going in point of thumb, or use no thumb at all. Especially with notes circling around the octave g or a
Let me illustrate this with two simple examples (all on the g string starting from the middle d):
1) d e f# g a g f# e d
You can play this as:
1 1 4 1 3 1 4 1 (so no thumb) or 1 4 T 1 3 1 T 4 1 (so thumb going in on F#)
2) d e f# g a b a g f# e d
You can play this as:
1 4 1 2 1 3 1 2 1 4 1 (no thumb) or 1 1 4 T 1 3 1 T 4 1 1 (thumb going in on G) or even 1 4 T 1 2 3 2 1 T 4 1 (thumb going in on F#)
What do you prefer? and do think it is better to be consistent in the going in point (like in the Simandl books) or to be more flexible?
Let me illustrate this with two simple examples (all on the g string starting from the middle d):
1) d e f# g a g f# e d
You can play this as:
1 1 4 1 3 1 4 1 (so no thumb) or 1 4 T 1 3 1 T 4 1 (so thumb going in on F#)
2) d e f# g a b a g f# e d
You can play this as:
1 4 1 2 1 3 1 2 1 4 1 (no thumb) or 1 1 4 T 1 3 1 T 4 1 1 (thumb going in on G) or even 1 4 T 1 2 3 2 1 T 4 1 (thumb going in on F#)
What do you prefer? and do think it is better to be consistent in the going in point (like in the Simandl books) or to be more flexible?

