We also discussed here a balance between different area – should you spend more effort in chumros in one area while you disregard others?
It is a hard question. On one hand, it is silly to see someone who, say, dresses machmir and then parks his car on a sidewalk. On the other hand, everyone naturally has certain talents and interests and should not throw them away. If someone is a talented piano player, you would not want him to work day and night on his science classes. Similarly, yes, Avraham was given a couple of tests that went against his middah of Hesed, but he still spent most of his life in hesed, instead of kicking kids out of home or threatening them with knives. Those were tests, not lifetime occupation.
SO, I think, as long as you realize there are these trade-offs between being machmir in something special and your general level, and them consciously select where to be machmir, you are OK. But if you are simply following “popular” chumros and not examine yourself, you are not.