Personally, it's much easier for me to be invested in a task when what I'm doing is 'interesting' to me.
Almost always and ironically, when something's interesting to me it's usually more difficult work and thus, contains far more unknowns, hence making estimates that much less reliable.
Almost always and ironically, when something's interesting to me it's usually more difficult work and thus, contains far more unknowns, hence making estimates that much less reliable.