It's difficult to say, a lot depends on the different classes' starting gear (rather than stats which don't really matter at the beginning). Don't be afraid to start a new character if things aren't to your liking early on. Someone who already has it (hate you) will be of more help.
Join our PS3 BF3 server! Search for 'Better than Halo' in the browser and bookmark us, and/or add me on PSN (ThemisB). We play most nights from 8pm GMT. See you on the Battlefield!