Yes, that is some good suggestions, maybe I should try out a Power Armor character at one point, I have mostly avoided Power Armor so far. One problem I have with just sticking with one weapon to mix up the feeling is that I find it really hard to have enough ammo on survival to be able to just stick with one weapon. I need to bring almost one weapon of every ammo type except heavy weapons to be sure to have enough ammo in ever situation.
I did one melee character, it was different, but it was a real bad match with survival and DiD
it is just very hard to play really tactical when you have to go into close combat.
I have made the base for a new character now though, he will be called "Seaman" and his character type is a sort of "freak of nature" and perks will focus mostly on things like being able to swim and travel without penalty underwater, different sorts of rad resistance, natural healing and the ability to charm animals and creatures etc. I will also try to focus on using the Syringe rifle for him when I can. Probably also different types of explosives and chems.
As for his personality I am thinking more an animal then a man, extremely natural and grey morality etc. So far I have found it hard to really make your characters peronality have any real impact on the game though.