Something is lacking in your amp or amp/speakers unit or the entire chain. The sound you get is not 'neutral', it is boring. Sound that is true to the recording will not be boring, it will be engaging in a right way. This is not to say that engaging sound cannot be far from the original. Preferences vary, that's why we choose different speakers.
To answer your question directly, even though you posed it incorrectly. Yes, amp should have a personality, and in fact it always does. Compare Gryphon to Soulution to DartZeel to FM Acoustic to Nagra. Top level transistor amps, they all will have distinct personalities in any set-up.
Sorry, man, you might have to sell both of your Sim Audio amps and go higher.
To answer your question directly, even though you posed it incorrectly. Yes, amp should have a personality, and in fact it always does. Compare Gryphon to Soulution to DartZeel to FM Acoustic to Nagra. Top level transistor amps, they all will have distinct personalities in any set-up.
Sorry, man, you might have to sell both of your Sim Audio amps and go higher.