Readability cannot ever be the concern because each has a different level of comprehension. If uppercase or lowercase throws one off, then the level of comprehension is probably not the main concern.

Table aliases are meant for two things: to uniquely identify columns and to be able to quickly substitute a different table name in the from clause when developing and testing. If either of these needs is not required in a given situation, then all the aliasing, commas, upper/lower case issues are just syntatic sugar -- don't waste time.

In fact there is one line out thought that we should always use fully qualified object names in production code so the substitution time can be avoided, especially when using recompile directive.