Hmm? I didn't like HL1 when I first played it (this would be around 1999(?)). I think I quit slightly after the resonance cascade... Anyway. It's hardly unfair to point out that HL2 has much more consistent quality in its levels than HL1.
Eh? Much more consistent level quality? What planet exactly are you on? The level quality is perfectly consistent on hl1...
P.S, if you've never played hl1 then gtfo!