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appreciate
I appreciate you for helping me. OR I appreciate your help.
No. Since "circumspect" is an adjective, "I appreciate your circumspect" is about as grammatically correct as "I appreciate your clean".
Saying "I appreciate your circumspect behavior" is correct, similar to "I appreciate your clean appearance".
I will/would appreciate a good answer to this question.
Appreciated is the past participle of appreciate.