i think modes are just straight preference, some may argue one is better than other but as someone above said, each of them has its pros and cons.
For ex, some may argue that subway is better because no overnights, less fare disputes or customer interactions, no relief points like Jane&Finch, but on the downside you're bound to the exact same route every day of your life, you are underground, you might have to deal with jumpers and depending on how emotional you are it may or may not affect you.
Some may like bus because of different route choices and prefer driving, but downsides are still there like bad relief points, or someone might not be comfortable driving a big vehicle and not comfortable with the turns.
Streetcars might be the mode of choice for those people who are not comfortable with driving a big vehicle, since you are bound to the tracks, but it also has its cons of no AC in old streetcars, have to watch out and go outside to move switches (otherwise you go wrong way and it does not have a reverse), or if there is an accident on the tracks, all streetcars are stuck and you are stuck too regardless if your shift has finished you are there until the accident is gone and you can proceed to your destination.
Personally, I am happy I got the bus as I love driving and having to do different routes, but I can see the pros and cons of every mode and why someone would hate one and love the other.