Molecular biologist - turned - bioinformatician.
For informatics side: I hack ugly code in C/C++ and bring into existence marvelous works of art and beauty in Fortran 90+ and Perl with a pinch of MPI and CUDA. I hate python because it forces indentation style different than mine and that is deadly, unforgivable sin. Also I cant find any python book i like.
For biologist side: Evolution, molecular chaperones, protein structures and protein folding.