I only liked the original New Mutants/X-Force stuff. Once he got his own series and Liefeld was long gone, I lost all interest. Most likely he didn't even become an interesting character until years or decades after Liefeld left, but I had long since moved on by then.
I remember that his story came to an exciting climax in the "X-Cutioner's Song" crossover, and then there was a three-parter in his solo series that tied up the loose ends and "ended" the Stryfe story. At least, it did at the time. I'm sure there's been lots more since then, but that was a good place for me to drop off.
(Didn't realize this thread was a year old. Oops.)