i do alot of research and testing before i buy anything, it makes the nerd in me happy, so i havent yet bought anything that i've really regretted.
i love my software.. uhh.. suite. sonar, acid, vegas, audition, reason. love em all to pieces.
worst must be... maybe komplete 2. the only pieces of it i use regularly is the kontakt sampler. i had high hopes for reaktor and the vocoder etc.. but for some reason, there's always something that sounds better for whatever i am doing (like the RHINO synth or the sonic flavours refills)... and audiomulch is letting me do alot of things that i thought i would do in reaktor.