Been working on my 3rd Shep in ME1. Just finished Feros. Even though its on Hardcore, after ME2 Insanity, I find it kinda easy/moderate. I'm playing Infiltrator (loving it) and have Snipes maxed out and bought the Spectre Sniper rifle. I kill most enemies in one shot, and if not, Assassination does. I hardly use any other weapons anymore.
I've been using Kaidan and Liara, and while Kaidan is the least compelling of all the squadmates, him and Liara make a great disabling team. Liara throws a Singularity and I pick them off, and if anything gets too close, Kaidan throws them or uses Neural Shock. Most organic enemies seem to be going down easily this way.
With all that said, I need to stop playing, cause I can feel the beginning of a "getting tired of this" feeling. I don't wanna be burnt out by the time ME3 comes out.