Interesting

absorbing, arresting, consuming, engaging, engrossing, enthralling, fascinating, gripping, immersing, intriguing, involving, riveting

breathtaking, electric, electrifying, exciting, exhilarating, galvanizing, inspiring, rousing, stimulating, stirring, thrilling; provocative, tantalizing; emphatic, showy, splashy, striking; alluring, attractive, bewitching, captivating, charming, enchanting, spellbinding; hypnotizing, mesmerizing; curious, odd, unusual, weird; amazing, astonishing, astounding, eventful, eye-opening, fabulous, marvelous ( marvellous), surprising, wonderful, wondrous; amusing, entertaining

operose, tiresome, tiring, wearisome, wearying; sterile, unexciting; dreary, humdrum, pedantic, pedestrian; demoralizing, discouraging, disheartening, dispiriting