(Image credit: OFFF Festival/Uncommon) Though I've been editor of Creative Bloq for a number of years now, I'm almost embarrassed to admit I'd never come to OFFF Festival, Barcelona. I watched merrily as team members came along, and didn't realise what I was missing out on. To help you avoid making the same mistakes I have, I'm here to tell you exactly why you need to come to this inspiring, friendly, buzzing, relaxed festival at least once in your creative life. I feel so strongly about it that I'm writing whilst still here, sitting in the sunshine on the steps next to one of the two outdoor screens and riding high on the sound of creative conversations all around me. Article continues below 01. Diverse creative program (Image credit: Future) I've already published gushing articles about the invigorating keynote speeches from Uncommon's Nils Leonard and JKR's Tosh Hall , which genuinely sent tingles around the room. But it isn't only the big branding agencies that deliver here.…