I have to agree, all things in hi-fi are massively system and listener dependent.
I've been surprised though by the level of impact the recti makes on any given output tube - it does seem the output tubes and recti have to have the right interaction/synergy for any one tube type to sound its best.
I've also been surprised by the varying output level of different tubes. I've been very careful to measure and note the in room SPL with different tubes when comparing them, otherwise its impossible to get a like for like comparison (given that even a 1dB variation can sway preference).
I've been surprised though by the level of impact the recti makes on any given output tube - it does seem the output tubes and recti have to have the right interaction/synergy for any one tube type to sound its best.
I've also been surprised by the varying output level of different tubes. I've been very careful to measure and note the in room SPL with different tubes when comparing them, otherwise its impossible to get a like for like comparison (given that even a 1dB variation can sway preference).