I wasn't suggesting that you "validate" your positions from opinion polls. However, right/center/left distinctions are relative to the beliefs of the public at large. Look at the issues and figure out the mid-point. That is the center.
Let's look at a few:
Taxes: Obama's position with respect to the expiration of the Bush tax cuts is clearly centrist. 37% want the cuts extended for all (right), 15% want the cuts to expire for everyone (left), and 44% want the cuts to be extended only for those with incomes under $250k (center). Even among Republicans, 43% would like to see tax cuts expire for the $250k+ crowd or for everyone, while only 54% want to see them extended for all.
Congress: More than 70% of the public disapproves of Congress (much more than disapprove of the President). However, while 20% approve of Republicans in Congress, 30% approve of Democrats. In "generic ballot" polls, Democrats and Republicans are now running in a statistical tie.
Health care: The majority now oppose "Obamacare". However, about one-fifth of this opposition is from people who believe it did not go far enough. Approximately 40% favor the current plan. When asked if the bill should be repealed, the majority favor repeal. When asked if they favor repeal given that repeal would eliminate provisions preventing coverage exclusion for pre-existing conditions, the number favoring repeal drops to under 20%.
Feelings about Washington: Washington is very unpopular among voters. However, the majority describe themselves as dissatisfied, but not angry. 20% describe themselves as angry. Among those who are "angry", the two biggest reasons given at partisanship and unemployment. Taxes are only mentioned by 4%.
Democrats vs Republicans: 34% report having a favorable view of the Republican Party, while 45% have a favorable view of the Democratic Party. With questions phrased in different ways, Democrats and Republicans are rated about equal on questions asking which has the better plans for improving the country.
These are just a small number of measures. However, polls are routinely showing the same thing across a brad spectrum of issues. We are closely divided between Republicans and Democrats. The number of people who would want government to be smaller with fewer services, is approximately equal to the number who want government to be bigger with more services. Ideology has little to do with American opinion. Rather, people are concerned about their ability to support their families and live their lives. When things are going wrong, they want change. They don't care if the solution is liberal or conservative. Those who do are the extremists.