The Buddha taught many times in the Mahayana sutras that the five aggregates, and the suffering that goes along with them, are of the nature of original and perfect purity. There is not the tiniest bit of impurity anywhere within them that needs to be abandoned.
Therefore, Mahayana practitioners do not want to be rid of their samsaric existence, but rather they aspire to take birth in samsara in as many bodies, in as many lifetimes as possible to be of benefit to sentient beings.
In Vajrayana practice, one cultivates the understanding that the five aggregates are of the nature of the five buddha families and that suffering is of the nature of bliss. Since that is the case, why would one ever want to abandon them? They are of the very essence of enlightenment.
Khenpo Tsultrim Rinpoche
from the book The Sun of Wisdom: Teachings on the Noble Nagarjuna's Fundamental Wisdom of the Middle Way
translated by Ari Goldfield
source: http://www.ktgrinpoche.org/teachings/quotes
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