Besides being more financially well-off & secure (rich) so I can take care of myself better, I can think of 2 - but it has to be one or the other, not both.
* Were-beast capabilities - except I maintain my intelligence and self-awareness and can do it at will (without the need of a full moon.); however, I'm at my strongest when it's nighttime, since I'm a night person in general. At daytime, any capabilities are slightly reduced to avoid being too OP.
Basically, 1) a wolf-like form for normal and underground maneuvering applications, to move very fast, jump good, nice sharp claws and toe-claws for CQC purposes; 2) a dragon-like form similar to the wolf-like form in capabilities, but built specifically for swimming purposes (since this form has gills when exposed to underwater areas.); 3) a bat-like form meant mostly for flight purposes to get around where my other forms can't.
I can only become 1 form at a time; no combinations. I can't exactly turn people into were-beasts like myself, either - if it does happen, it's a very rare occurrence and usually only happens when I have a cold or allergies and am unfortunately spreading unwanted germs. When that happens, I aim to stay far away from people, so as to not go spreading things around.
* Vampire capabilities - except with none of the stupider weaknesses.
- However: Wooden stake to the heart - fuck, just getting stabbed in the heart? Done for.
- Sunlight simply lowers any powers I might have by 25% (50% on very hot days); Like the were-beast thing, I'm only at my best when it's nighttime.
- Holy water / water in general? Not harmful. In fact, I need it to be able to keep my body hydrated and wash myself.
- I can enter people's houses of my own free will, but inviting me in means I'll be polite about it that little bit more.
- Garlic... it'll basically have the same effect on me as drinking too much alcohol in one sitting...
- Rice and counting it? I'll just knock the crap out of you for annoying me like that.
Basically enough, I have extremely good sight and hearing, jump really good (which basically mimics bat-like flight), move faster (ninja-like tactics) and hit harder than normal; also, I don't wear shoes, since I have razor-sharp claws and toe claws for additional effective CQC purposes.
I drink blood as part of a healthy diet, but I don't aim to kill people, unless it's deserved - I get my blood, using my ninja-like tactics involving sneaking up on people and either throwing / quietly stabbing them with needles, intending to knock them out, get what I need, and get outta there without getting noticed.
I mostly get my nourishment from eating a meat-heavy diet, unlike humans who need a strong amount of veggies and fruits, etc., to keep themselves in check.
I don't go turning people into vamps for no good reason, either - fun as the idea sounds. It's just too much trouble.