It is outlined by the plain black print of text books and the stark walls of the classroom which have always unfailingly left me dissatisfied, and I yearn to break out of this academic routine.
"and" is a more appropriate conjunction
Although I have always had a full course load, I have never been a full time student
I had to re read this multiple times, because I thought you meant "never been a full time student" meant that you only go to school part time, make sense? Anyway, I suggest that you rephrase the sentence
His creations captured the blend of civic pride and social advancement of the time;
I think "social rise" just sound awkward
I think you're trying to spread yourself too far in this essay. Trying to focus on one or two things that you really like about Barcelona. Things like "picky palette" or "religion not my own" is good, but too much of it is unnecessary.
Also, I feel like you're trying too hard to paint a picture of semi-irrelevant stuff and didn't dedicate enough space to focus on the main points.
In a city bursting with life like Barcelona, lessons will arrive as smells, sounds, textures, sights and flavors. The sound of grandmothers bargaining for the morning's catch will help me improve on my language skills as I'll try to decipher their rapid chatter. The flavors of paella will expand my picky palette. The smell of incense will draw me into the Catedral de Barcelona where I can delve into a religion that is not my own. The sight of the Barcelona skyline, a medley of acroterions, myriad domes, mosaics, and finials, will be the place where I fall effortlessly deeper in love with Catalan modernism.
Five days, four hundred units, three lectures and a math tutorial are all organized neatly to make my winter quarter schedule. The scheme of my education is currently mapped out without room for error and exploration. It is outlined by the plain black print of text books and the stark walls of the classroom which have always unfailingly left me dissatisfied, but I yearn to break out of this academic routine. Although I have always had a full course load, I have never been a full time student; a class syllabus only plans my education within a lecture hall.Studying abroad is like a 24 hour class without a syllabus and it has always been my plan to, well, learn without a plan. I possessthis intellectual curiosity to seek answers to questions beyond what a formal education might supply.
See? There's two different pictures that really takes up a lot of your space; I suggest only using one picture, namely the Barcelona one. You can open with the Barcelona para. to provide the reader with a sense of what you will experience and briefly mention how you want to get away from the "stark classroom walls" to have a more fulfilling experience as a student; you wouldn't need anything more than that. Above, I crossed out parts to reveal the meat-and-bone of your para. that you might absolutely want to include.
Good luck!
P.S. these are only suggestions. Do what you feel will be a good essay.