Coming from Eclipse and now working in Visual Studio I was trying to assign my hotkey bindings to the same ones I used to have in Eclipse. I have Resharper installed, too.
I’ve assigned Ctrl+T to “Type Hierarchy” but it still seems to respond as it did just before : it expects me to press another key, as Ctrl+T is being identified as a combo.
Is there any way to accomplish this?
First off, if you’re so used to Ctrl+T, at least set it to invoke “Inspect This” (ReSharper.ReSharper_InspectThis in VS options), which brings up a drop-down letting you choose between Type Hierarchy, Call and Value Tracking.
As to shortcut assignment, I’m guessing that you have IntelliJ keymap set up in ReSharper. If that’s the case, in order to have Ctrl+T reassigned, you’ll have to ruin the entire range of ReSharper’s unit testing shortcuts:
If you switch to VS keymap (ReSharper > Options > Environment > Keyboard & Menus > Visual Studio > Apply scheme), it gets substantially better as in all contexts (except for XAML UI Designer for some reason) VS won’t expect Ctrl+T to be a part of a combo:

You’ll still have to transfer a fundamental ReSharper shortcut which is Go To Type to another shortcut but this is less pain than killing the entire unit testing subsystem.
Last but not least, if you’re going to stay with Visual Studio for long, try force yourself to use any of the two standard ReSharper keymaps. ReSharper documentation and ReSharper users talk shortcuts, which sets you up for a hard time learning and communicating.