I also have Too Faced Shadow Insurance which I also like because you only need a tiny amount, so the tube I have will last me forever. However, I do find that if left for a while, the product can separate which isn't great. So I usually only use these as bases if I want the colour impact to be super-strong.
My favourite eyeshadow bases are Benefit Creaseless Cream Shadows and I have three of them: Birthday Suit, Busy Signal and Strut.
For nearly every neutral eye look I do, I use Birthday Suit as a base. The shimmer means it can double as a highlight in the tear duct area and it goes especially well with MAC Sable in the crease. However, the shimmer is in no way offensive or overpowering! I also prefer teaming this with the lighter shades in the Naked Palette rather than using Primer Potion as it it just easier and quicker to apply and blend.
I also adore these shadows for their ease of application. If I'm really rushing, I can literally wear Birthday Suit applied roughly with my finger, add a sweep of mascara and I'm ready to go.
The darker colours are also great for more intense looks. I used Busy Signal in this look that I posted a while back. Strut is also great for a grey/black smokey eye or with Urban Decay Gunmetal in the crease.
Overall I really recommend these as they won't budge all day and really do not crease at all. The packaging is also gorgeous which is always a plus. Can't wait to get my hands on a few more shades!!