Which debugger is best?

[Squidge]

I use Ollydbg and IDA for most 'debugging'. IDA has built in debugger, but I prefer Olly. IDA is best for examining structure of code and then exporting names to Olly. IDA also has decompiler plugin, but meh, I prefer to look at the assembler code in graph view - makes more sense to me.

Course, if your target isn't x86, then you have no choice but to use IDA.

For kernel work I use WinDbg and sometimes Softice, depending on the exact problem.