I can't really comment on that as different people probably label themselves different things.
I believe most of us hold some liberal opinions and some conservative opinions. I think it's a mistake to put yourself into any single category and automatically side with it. Military tacticians use that in battle to divide a powerful enemy into many weaker ones.
Liberal;
1. favorable to progress or reform, as in political or religious affairs.
2. noting or pertaining to a political party advocating measures of progressive political reform.
3. of, pertaining to, based on, or advocating liberalism.
4. favorable to or in accord with concepts of maximum individual freedom possible, especially as guaranteed by law and secured by governmental protection of civil liberties.
5. favoring or permitting freedom of action, especially with respect to matters of personal belief or expression: a liberal policy toward dissident artists and writers.
Liberalism;
1. the quality or state of being liberal, as in behavior or attitude.
2. a political or social philosophy advocating the freedom of the individual, parliamentary systems of government, nonviolent modification of political, social, or economic institutions to assure unrestricted development in all spheres of human endeavor, and governmental guarantees of individual rights and civil liberties.
3. the principles and practices of a liberal party in politics.
4. a movement in modern Protestantism that emphasizes freedom from tradition and authority, the adjustment of religious beliefs to scientific conceptions, and the development of spiritual capacities.
Progressive;
1. favoring or advocating progress, change, improvement, or reform, as opposed to wishing to maintain things as they are, especially in political matters: a progressive mayor.
2. making progress toward better conditions; employing or advocating more enlightened or liberal ideas, new or experimental methods, etc.: a progressive community.
3. characterized by such progress, or by continuous improvement.
4. of or pertaining to any of the Progressive parties in politics.
5. going forward or onward; passing successively from one member of a series to the next; proceeding step by step.
What's in bold is what I personally agree with