anxiously, zealously, intently, sincerely, expectantly, anticipatorily, vigorously, readily, earnestly, willingly, heartily, enthusiastically, energetically, strenuously, fiercely, cordially, readily, promptly, rapidly, breathlessly, speedily, hungrily, thirstily, fervently, ardently, zestfully, actively, spiritedly, cravingly, with enthusiasm, longingly, impatiently, gladly, with zeal, with zest, with gusto, with a will, with a good will, with open arms, keenly, with all one's heart, with heart and soul, from the bottom of one's heart, with delight, with relish, with might and main, full tilt*.
Antonyms unwillingly*, listlessly, grudgingly.
