Dealing with problem employees can be rather hairy. Letting someone go can be a long process and as far as I've seen is rarely done.
Sometimes you will be paired with someone you do not get along with or do not like. It isn't fun and can lead to a draining and frustrating work week, but thankfully it might be months before you have to pair with them again.
Though our tours tend to talk up how many introverts work here, know that you'll still need to cultivate your extrovert skills if you expect to get promotions. Talking in front of groups, advocating for yourself, and volunteering for tasks is the just short list. The team will support you in all of it, but expect to be pushed out of your comfort zone fairly regularly. Practice makes perfect and it gets easier over time, but it takes some getting used to.
Paying for parking is a pain point. Only full-time employees qualify for a parking pass and even those are in short supply. If you are on the wait list you get some reimbursement, but you will likely be paying more than that out of pocket. Once the current office lease is up in about 3 years we'll be relocating--location not yet chosen--and there is a strong consensus that we'll be looking for somewhere with free parking available, so it is a problem that will hopefully resolve itself soon enough.