The visit is what turns people off. It’s due to where it is in Baltimore (the neighborhood, the look, the feel/vibe, etc). Everything can look great on paper, but when they go there (and compare it to other schools) many students return preferring elsewhere. Some still like it. I can’t tell which side of the coin you will fall on TBH. Only you can. JHU isn’t the only place that turns some people off (or on). It’s just one place I see it happen more often (along with Drexel & GW for urban atmospheres, but it also happens with very rural places or very Greek places).