I've found that subtle animations and micro-interactions actually do make a noticeable difference in user engagement, especially for landing pages and product sites. Clients love seeing hover effects and smooth transitions because it makes their sites feel more premium and modern without being distracting. Dark mode options have also been genuinely useful, not just trendy - users appreciate having the choice, and it's become almost expected for certain types of sites like SaaS dashboards or creative portfolios.
As for the hype, I'd say brutalism and those super experimental layouts with overlapping text and chaotic typography look amazing in design awards but rarely work for actual businesses. Most clients get cold feet when they see it, and honestly, their customers usually just find it confusing. Same thing with over-the-top 3D elements and heavy parallax effects - they tank page load times and don't really improve conversions. I've also noticed that glassmorphism had its moment but it's already feeling dated, and it often creates accessibility issues with text contrast. The trends that stick around are usually the ones that solve real problems rather than just looking cool in a Behance mockup.