Lord Hanuman can be worshipped as the dear servant of Lord Rama (following Tulsidasji)or as Rudratmaka(following the Ramanandi Vaishnavas) or by the Tanrik way (following Tantrasaara). Please see the answers to the question : Is Hanuman an avatar of Lord Shiva? and Is worship of Lord Hanuman associated with Vaishnavism or Shaivism?
The fruit of the worship depends on the perception or 'bhava' of the sadhaka, as goes the saying :
mantre tirthe dvije deve daivajne vishaje gurau/ yadrishi bhAvana yasya siddhir bhavati tAdrishi//
Narada defines 'bhakti' as 'sA tu asmin parama-prema-rupa'. He does not mention any specific form by 'Asmin'. So Hanumanji can very well be one's chosen deity.
As Tulsidasji writes in the Hanuman-Chalisa:
और देवता चित्त न धरई।
हनुमत सेइ सर्ब सुख करई।। My mind does not like any other form.It gets all bliss from Hanumanji.
This He is saying on behalf of a common devotee of Sri Hanuman as His own Ishta was Sri Rama.
The Veera-sadhana of Hanumatdeva according to the Tantra can get anything he wants.
So I think it is the 'bhava' and devotion that are important.
The renowned saint Sri Neev Karori Baba was a Realised Soul Whose Chosen Deity was Hanumanji.
Hope this answers your question.